CN112803610A - Device to be charged, system, wireless charging method and storage medium - Google Patents

Device to be charged, system, wireless charging method and storage medium Download PDF

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Publication number
CN112803610A
CN112803610A CN201911115066.4A CN201911115066A CN112803610A CN 112803610 A CN112803610 A CN 112803610A CN 201911115066 A CN201911115066 A CN 201911115066A CN 112803610 A CN112803610 A CN 112803610A
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CN
China
Prior art keywords
charging
voltage
conversion circuit
current
battery
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Pending
Application number
CN201911115066.4A
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Chinese (zh)
Inventor
杨军
万世铭
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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Publication date
Application filed by Guangdong Oppo Mobile Telecommunications Corp Ltd filed Critical Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority to CN201911115066.4A priority Critical patent/CN112803610A/en
Priority to EP20887927.0A priority patent/EP4024656A4/en
Priority to PCT/CN2020/127486 priority patent/WO2021093704A1/en
Publication of CN112803610A publication Critical patent/CN112803610A/en
Priority to US17/721,601 priority patent/US20220239155A1/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
    • H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/007188—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters
    • H02J7/007192—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters in response to temperature
    • H02J7/007194—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters in response to temperature of the battery
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/29—Terminals; Tapping arrangements for signal inductances
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/14—Inductive couplings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J2207/20—Charging or discharging characterised by the power electronics converter
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/80—Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices

Abstract

The embodiment of the application discloses equipment to be charged, a system, a wireless charging method and a storage medium, wherein the equipment to be charged comprises a receiving coil, a first charging unit and a second charging unit, wherein the receiving coil comprises a first end, a second end and a middle tap; the first charging unit is respectively connected with the first end and the middle tap and is used for converting the electromagnetic signals received by the first end and the middle tap of the receiving coil into a first voltage and a first current for charging a battery; and the second charging unit is respectively connected with the second end and the middle tap and is used for converting the electromagnetic signals received by the second end and the middle tap of the receiving coil into a second voltage and a second current for charging the battery.

Description

Device to be charged, system, wireless charging method and storage medium
Technical Field
The present application relates to the field of wireless communication technologies, and in particular, to a device to be charged, a system, a wireless charging method, and a storage medium.
Background
At present, common charging modes of electronic equipment such as smart phones, palm computers, notebooks and charge pads comprise wired charging and wireless charging. When the user adopts wired charging for electronic equipment, need just can charge through charging cable connection charging adapter and the electronic equipment who is charged, in case the charging cable is lacked, then can't charge for electronic equipment. However, although wireless charging has the advantage of no need of a charging cable, the charging efficiency is low and the charging power is limited due to the limitations of the wireless charging receiving coil and the integrated circuit process requirements based on the existing wireless charging scheme.
Disclosure of Invention
The embodiment of the application provides a to-be-charged device, a to-be-charged system, a wireless charging method and a storage medium, which can improve charging power and reduce charging heat, so that charging efficiency can be improved.
The technical scheme of the application is realized as follows:
in a first aspect, an embodiment of the present application provides an apparatus to be charged, where the apparatus to be charged includes:
a receive coil comprising a first end, a second end, and an intermediate tap;
the first charging unit is respectively connected with the first end and the middle tap and is used for converting the electromagnetic signals received by the first end and the middle tap of the receiving coil into a first voltage and a first current for charging a battery;
and the second charging unit is respectively connected with the second end and the middle tap and is used for converting the electromagnetic signals received by the second end and the middle tap of the receiving coil into a second voltage and a second current for charging the battery.
In a second aspect, an embodiment of the present application provides an apparatus to be charged, including:
the receiving coil comprises a first end, a second end and N taps, wherein N is a positive integer greater than 1;
the first charging unit is respectively connected with the first end and a first tap of the N taps and is used for converting the electromagnetic signals received by the first end and the first tap of the receiving coil into a first voltage and a first current for charging a battery;
the ith charging unit is respectively connected with the i-1 th tap and the ith tap of the N taps and is used for converting the electromagnetic signals received by the i-1 th tap and the ith tap of the receiving coil into the ith voltage and ith current for charging the battery, wherein i is a positive integer greater than 1 and less than or equal to N;
and the (N + 1) th charging unit is respectively connected with the (N) th tap of the (N) taps and the second end and is used for converting the electromagnetic signals received by the (N) th tap of the receiving coil and the second end into the (N + 1) th voltage and the (N + 1) th current for charging the battery.
In a third aspect, an embodiment of the present application provides a wireless charging system, where the wireless charging system includes a wireless transmitting apparatus and a device to be charged; the wireless transmitting device comprises a transmitting coil, and the equipment to be charged comprises a receiving coil, a first charging unit and a second charging unit; wherein the content of the first and second substances,
a transmitting coil for transmitting an electromagnetic signal;
the receiving coil comprises a first end, a second end and a middle tap and is used for receiving the electromagnetic signal transmitted by the transmitting coil;
the first charging unit is respectively connected with the first end and the middle tap and is used for converting the electromagnetic signals received by the first end and the middle tap of the receiving coil into a first voltage and a first current for charging a battery;
and the second charging unit is respectively connected with the second end and the middle tap and is used for converting the electromagnetic signals received by the second end and the middle tap of the receiving coil into a second voltage and a second current for charging the battery.
In a fourth aspect, an embodiment of the present application provides a wireless charging method, which is applied to a device to be charged, and the method includes:
receiving an electromagnetic signal by a receiving coil; the receiving coil comprises a first end, a second end and a middle tap, the first charging unit is respectively connected with the first end and the middle tap, and the second charging unit is respectively connected with the second end and the middle tap;
converting, by the first charging unit, electromagnetic signals received by the first end and the center tap of the receiving coil into a first voltage and a first current for charging a battery;
converting, by the second charging unit, electromagnetic signals received by the second end and the center tap of the receiving coil into a second voltage and a second current for charging a battery;
providing the first voltage and the first current and the second voltage and the second current to the battery for charging.
In a fifth aspect, embodiments of the present application provide a computer storage medium storing a wireless charging program, which when executed by a device to be charged implements the method according to the fourth aspect.
The device to be charged, the system to be charged, the wireless charging method and the storage medium provided by the embodiment of the application can comprise a receiving coil, a first charging unit and a second charging unit, wherein the receiving coil comprises a first end, a second end and a middle tap; the first charging unit is respectively connected with the first end and the middle tap and is used for converting the electromagnetic signals received by the first end and the middle tap of the receiving coil into a first voltage and a first current for charging a battery; the second charging unit is respectively connected with the second end and the middle tap and is used for converting the electromagnetic signals received by the second end and the middle tap of the receiving coil into a second voltage and a second current for charging the battery; therefore, the receiving coil adopts a tapping mode, a plurality of charging paths can be formed, and each charging path can charge the battery, so that the charging power of the equipment to be charged is improved; in addition, because there are a plurality of charging paths, can also make the charging power on each charging path reduce to some extent, so can disperse the point that generates heat, reduce to charge and generate heat, thereby still promoted charging efficiency.
Drawings
Fig. 1 is a schematic structural diagram of a wireless charging system according to a related art;
fig. 2 is a schematic structural diagram of a device to be charged according to an embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of another device to be charged according to an embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of another device to be charged according to an embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of another device to be charged according to an embodiment of the present disclosure;
fig. 6 is a schematic structural diagram of another device to be charged according to an embodiment of the present disclosure;
fig. 7 is a schematic structural diagram of a wireless charging system according to an embodiment of the present disclosure;
fig. 8 is a schematic flowchart of a wireless charging method according to an embodiment of the present disclosure;
fig. 9 is a flowchart illustrating another wireless charging method according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant application and are not limiting of the application. It should be noted that, for the convenience of description, only the parts related to the related applications are shown in the drawings.
The wireless charging technology is derived from a wireless power transmission technology, and wireless charging modes are mainly divided into an electromagnetic induction type (or magnetic coupling type), a radio wave type and an electromagnetic resonance type according to different wireless charging principles. Currently, the mainstream Wireless charging standards include Qi standard, Power Materials Alliance (PMA) standard, Wireless Power Alliance (Alliance for Wireless Power, A4WP), and the like; the Qi standard and the PMA standard both use an electromagnetic induction type for wireless charging, and the A4WP standard uses an electromagnetic resonance type for wireless charging. In the embodiment of the application, the wireless charging technology for the device to be charged adopts an electromagnetic induction type, the wireless transmitting device (such as a wireless charging base) and the device to be charged transmit energy through a magnetic field, and the wireless transmitting device and the device to be charged are connected without a charging cable, so that the battery in the device to be charged can be charged, and the charging is more convenient.
It is to be understood that the device to be charged may refer to a terminal, which may include, but is not limited to, a device configured to receive/transmit communication signals via a wireline connection (e.g., via a Public Switched Telephone Network (PSTN), a Digital Subscriber Line (DSL), a Digital cable, a direct cable connection, and/or another data connection/Network) and/or via a Wireless interface (e.g., a Wireless Local Area Network (WLAN) for a cellular Network, a DVB-H Network, a Digital television Network such as a Digital Video Broadcasting (DVB-H) Network, a satellite Network, an Amplitude Modulation-Frequency Modulation (AM-FM) broadcast transmitter, and/or a Wireless interface of another communication terminal). Among them, a terminal configured to communicate through a wireless interface may be referred to as a "wireless communication terminal", "wireless terminal", and/or a "mobile terminal", where the mobile terminal includes, but is not limited to, a mobile terminal device such as a mobile phone, a tablet computer, a notebook computer, a palm top computer, a Personal Digital Assistant (PDA), a Portable Media Player (PMP), a navigation device, and the like, and may also include a fixed terminal device such as a Digital TV, a desktop computer, and the like. In addition, the device to be charged used in the embodiment of the present application may further include a mobile power supply, and the mobile power supply may store the received charging energy to provide energy to other electronic devices. In the embodiments of the present application, this is not particularly limited.
Referring to fig. 1, a schematic diagram of a composition structure of a wireless charging system 10 provided in the related art is shown; as shown in fig. 1, the wireless charging system 10 includes a power supply device 110, a wireless transmitting device 120, and a device to be charged 130. The wireless transmitting apparatus 120 includes a transmitting unit 121, and the device to be charged 130 includes a receiving unit 131, a charging unit 132, and a battery 133. Here, the wireless transmitting apparatus 120 may be, for example, a wireless charging base, and the device to be charged 130 may be, for example, a terminal.
After the power supply device 110 is connected to the wireless transmitting apparatus 120, the output voltage and the output current of the power supply device 110 are transmitted to the wireless transmitting apparatus 120.
The wireless transmitting apparatus 120 may convert the output voltage and the output current of the power supply device 110 into a wireless charging signal (electromagnetic signal) through the internal transmitting unit 121 to transmit. For example, the transmitting unit 121 may convert the output current of the power supply apparatus 110 into an alternating current, and convert the alternating current into an electromagnetic signal through a transmitting coil or a transmitting antenna.
The device to be charged 130 may receive the electromagnetic signal transmitted by the transmitting unit 121 through the receiving unit 131, and then perform voltage conversion on the electromagnetic signal through the charging unit 132 to obtain a charging voltage and/or a charging current expected by the battery 133 in the device to be charged 130. The charging unit 132 includes a rectifying circuit 1321 and a voltage converting circuit 1322, that is, the rectifying circuit 1321 can convert the electromagnetic signal into an output voltage and an output current of the rectifying circuit 1321. Here, the receiving unit 131 may convert the electromagnetic signal transmitted by the transmitting unit 121 into an alternating current by a receiving coil or a receiving antenna, and then rectify and/or filter the alternating current by the rectifying circuit 1321 to convert the alternating current into an output voltage and an output current of the rectifying circuit 1321.
In some embodiments, prior to wireless charging, the wireless transmitting apparatus 120 may pre-negotiate the transmission power of the transmitting unit 121 with the device to be charged 130. Assuming that the power negotiated between the wireless transmission device 120 and the device to be charged 130 is 5W, the output voltage and the output current of the rectifying circuit 1321 are typically 5V and 1A. Assuming that the power negotiated between the wireless transmission device 120 and the device to be charged 130 is 10.8W, the output voltage and the output current of the rectifying circuit 1321 are typically 9V and 1.2A.
If the output voltage of the rectifying circuit 1321 is not suitable for being directly applied to the two ends of the battery 133, it is also necessary to perform constant voltage and/or constant current control through the voltage converting circuit 1322 to obtain the charging voltage and/or charging current expected by the battery 133 in the device to be charged 130.
The voltage conversion circuit 1322 may be configured to convert the output voltage of the rectifying circuit 1321 such that the output voltage and/or the output current of the voltage conversion circuit 1322 meets the requirement of the charging voltage and/or the charging current expected by the battery 133. In some embodiments, the voltage converting circuit 1322 may be a charging Integrated Circuit (IC), a charge pump (charge pump) circuit, a Buck-Boost (Buck-Boost) circuit, a Low Dropout Regulator (LDO), or the like.
In practical applications, since the device to be charged 130 is affected by the volume and the integrated circuit process, the receiving unit 131 usually includes a receiving coil. Moreover, the currently common wireless charging mode is single-path wireless charging, and as the requirement of wireless charging power is continuously increased, the current on the coil cannot be very large due to the limitation of the receiving coil, so that the charging power can be increased by increasing the voltage on a rectifier bridge in the rectifier circuit 1321; however, when the voltage exceeds 30 volts (V), the integrated circuit process and cost will be very high, which limits further increase of the charging power, according to the requirements of the existing integrated circuit process. In addition, the design space and the heat dissipation space of the device to be charged 130 are both small (for example, the physical size of the mobile terminal used by the user is increasingly light and thin, and meanwhile, a large number of electronic components are densely arranged in the mobile terminal to improve the performance of the mobile terminal), which also causes that the heat focused in the device to be charged 130 is difficult to be removed in time, so that the charging efficiency is very low.
In order to solve the above problem, an embodiment of the present application provides a device to be charged, which may include a receiving coil, a first charging unit, and a second charging unit, where the receiving coil includes a first end, a second end, and a middle tap; the first charging unit is respectively connected with the first end and the middle tap and is used for converting the electromagnetic signals received by the first end and the middle tap of the receiving coil into a first voltage and a first current for charging a battery; the second charging unit is respectively connected with the second end and the middle tap and is used for converting the electromagnetic signals received by the second end and the middle tap of the receiving coil into a second voltage and a second current for charging the battery; therefore, the receiving coil adopts a tapping mode, so that not only can the coil be enlarged, but also a charging path can be increased, and the charging power of the equipment to be charged is improved; in addition, because the charging paths are multiple, the charging power on each charging path can be reduced, heating points can be dispersed, charging heating is reduced, and charging efficiency is improved.
Embodiments of the present application will be described in detail below with reference to the accompanying drawings.
Referring to fig. 2, a schematic diagram of a composition structure of a device to be charged 20 provided in an embodiment of the present application is shown; as shown in fig. 2, the device to be charged 20 may include a receiving coil 210, a first charging unit 211, and a second charging unit 212, wherein,
a receiving coil 210 including a first end a, a second end b, and a middle tap c;
a first charging unit 211 connected to the first end a and the middle tap c, respectively, for converting the electromagnetic signals received by the first end a and the middle tap c of the receiving coil 210 into a first voltage and a first current for charging the battery 213;
and a second charging unit 212, connected to the second end b and the middle tap c, respectively, for converting the electromagnetic signals received by the second end b and the middle tap c of the receiving coil into a second voltage and a second current for charging the battery 213.
The tap indicates one or more terminals connected to the coil or winding during the middle winding process, and may be regarded as a connection of a plurality of coils or windings in series, and a lead connected to a connection point of the series connection is referred to as a tap. For the receiving coil 210, the leading-in wires and the leading-out wires of the head and the tail are not counted, only the lead of the intermediate joint is calculated, when only one lead of the intermediate joint is used, the receiving coil is called to have one tap, and the tap can be called as a center tap; when the lead wire of the intermediate contact has a plurality of pieces, it is referred to that the receiving coil has a plurality of taps.
Thus, when the receiving coil 210 has one center tap, the received electromagnetic signal can be divided into two electromagnetic signals by the center tap, and the two electromagnetic signals are correspondingly input to two charging units (including the first charging unit 211 and the second charging unit 212) to form two charging paths; in addition, when the receiving coil 210 has a plurality of taps, the received electromagnetic signal may be divided into a plurality of electromagnetic signals by the plurality of taps, and the plurality of electromagnetic signals may be correspondingly input to the plurality of charging units to form a plurality of charging paths.
In the embodiment of the present application, since the receiving coil 210 adopts a center tap manner, two charging paths can be formed, and each charging path can charge the battery 213, so that the charging power of the device to be charged 20 can be increased; in addition, because two charging paths exist, the charging power on each charging path can be reduced, heating points can be dispersed, charging heating is reduced, and charging efficiency is improved.
In some embodiments, the device to be charged 20 further comprises a first control unit 214 on the basis of the device to be charged 20 shown in fig. 2, wherein,
a first control unit 214, configured to control the first charging unit 211 and/or the second charging unit 212 to operate according to a charging mode or a charging phase of the battery 213, so as to charge the battery 213;
wherein the charging mode comprises a first charging mode and a second charging mode, the charging speed of the first charging mode is greater than the charging speed of the second charging mode, and the charging phase of the battery at least comprises one of the following charging phases: a trickle charge phase, a constant current charge phase and a constant voltage charge phase.
It should be noted that, in one possible embodiment, the first charging mode may correspond to a constant current charging phase, and the second charging mode may correspond to a trickle charging phase and/or a constant voltage charging phase.
In another possible embodiment, the charging mode may also not correspond to the charging phase, i.e. the charging mode corresponds to the charging speed; for example, in the fast charging mode with a faster charging speed, when the required charging power is higher than the set value, which is the first charging mode, two charging units (including the first charging unit 211 and the second charging unit 212) may operate simultaneously; otherwise, in the normal charging mode with a slower charging speed, which is the second charging mode at this time, only one of the charging units (the first charging unit 211 or the second charging unit 212) may be operated. In this case, in the first charging mode, which charging unit operates may be consistent with the constant current charging stage; in the second charging mode, which charging unit operates may be consistent with the trickle charging phase and/or the constant voltage charging phase.
Further, on the basis of the device to be charged 20 shown in fig. 2, the first charging unit 211 includes a first ac-dc conversion circuit 211a and a first voltage conversion circuit 211 b; the second charging unit 212 includes a second ac-dc conversion circuit 212a and a second voltage conversion circuit 212 b.
As shown in fig. 2, in the first charging path, the first end a and the middle tap c of the receiving coil 210 are connected to the first ac-dc converting circuit 211a, and the first ac-dc converting circuit 211a and the first voltage converting circuit 211b are connected, and then connected to the battery 213 by the first voltage converting circuit 211b to realize charging of the battery 213; in the second charging path, the second end b and the middle tap c of the receiving coil 210 are connected to the second ac-dc converting circuit 212a, and the second ac-dc converting circuit 212a and the second voltage converting circuit 212b are connected, and then connected to the battery 213 by the second voltage converting circuit 212b to realize charging of the battery 213.
It should be noted that, the first ac-dc conversion circuit 211a or the second ac-dc conversion circuit 212a is configured to perform ac-dc voltage conversion on a path of electromagnetic signals correspondingly received from the receiving coil 210 to obtain a dc voltage and a dc current; a first voltage conversion circuit 211b or a second voltage conversion circuit 212b, configured to perform dc-dc voltage conversion on the dc voltage and the dc current to obtain an output voltage and an output current corresponding to each charging unit, for example, in a first charging path, a first voltage and a first current output by the first charging unit 211 may be provided for the battery 213 to be charged; in the second charging path, the second voltage and the second current output by the second charging unit 212 may be supplied to the battery 213 for charging.
Further, the first control unit 214 is specifically configured to control the first ac/dc conversion circuit 211a and the first voltage conversion circuit 211b to operate and/or control the second ac/dc conversion circuit 212a and the second voltage conversion circuit 212b to operate according to a charging mode or a charging phase of the battery 213.
It should be noted that the first control Unit 214 may be a separate Micro Control Unit (MCU) in the device 20 to be charged, so as to improve the reliability of the control. In some embodiments, the first control unit 214 may also be an Application Processor (AP) in the device to be charged 20, so that hardware cost can be saved. The embodiments of the present application are not particularly limited.
It should be noted that, during the charging process of the device to be charged, the charging phase may include a trickle charging phase, a constant current charging phase and a constant voltage charging phase. The trickle charge stage is mainly used for pre-charging (restoring charge) a fully discharged battery, and usually, the trickle charge is adopted when the battery voltage of the single-cell lithium battery is lower than about 3V, and the trickle charge current is generally one tenth of the constant-current charge current; the constant-current charging stage is mainly used for increasing the charging current to perform constant-current charging when the voltage of the battery rises above a trickle charging threshold; the current of constant current charging is generally between 0.2C and 1.0C; in the constant-current charging stage, the voltage of the battery gradually rises along with the constant-current charging process, and the voltage range of the common single-cell lithium battery in the constant-current charging stage is 3.0-4.2V; the constant voltage charging stage is mainly characterized in that when the voltage of the battery rises to 4.2V, the constant current charging stage is ended, the constant voltage charging stage is started, the charging current gradually decreases along with the continuation of the charging process, and when the voltage is reduced to 0.01C, the charging can be considered to be cut off. Here, C denotes a nominal capacity of the battery, and 0.01C may be regarded as a charge cutoff current of the battery.
In the embodiment of the present application, for the charging phase, there may be no constant voltage charging phase, that is, the charging phase only includes a trickle charging phase and a constant current charging phase; alternatively, the constant-voltage charging stage may be adjusted to a segmented constant-voltage charging stage, that is, the charging stage includes a trickle charging stage, a constant-current charging stage, and a segmented constant-voltage charging stage, which is not specifically limited in the embodiment of the present application.
In some embodiments, the first voltage conversion circuit 211b is a Buck (Buck) circuit, a charging Integrated Circuit (IC), or a Buck-Boost (Buck-Boost) circuit.
Further, the first control unit 214 is configured to control the first voltage conversion circuit 211b to operate in one or more of the following charging phases: the trickle charge phase, the constant current charge phase, and the constant voltage charge phase.
In some embodiments, the second voltage conversion circuit 212b is a Charge pump (Charge pump) circuit.
Further, the first control unit 214 is configured to control the second voltage conversion circuit 212b to operate in the constant current charging phase.
It should be noted that the Buck circuit, the charging IC, the Buck-Boost circuit, or the Charge pump circuit are all circuits for Direct-Current (DC-DC) voltage conversion; the ratio of the input voltage to the output voltage of the Charge pump circuit can be 1:1, 2:1, 3:1, …, N:1 and the like; the charging IC may be an integration of circuits such as an identification circuit, an LDO circuit (voltage regulator circuit), a buck/boost circuit, a path management circuit, and a temperature detection circuit, but the embodiments of the present application are not particularly limited.
In some embodiments, the first voltage conversion circuit 211b and the second voltage conversion circuit 212b are both Charge pump circuits; at this time, the device to be charged 20 may further include a third voltage conversion circuit 215 connected to the first ac-dc conversion circuit 211a and/or the second ac-dc conversion circuit 212 a; the third voltage conversion circuit 215 is a charging IC, a Buck circuit, or a Buck-Boost circuit.
Further, the first control unit 214 is configured to control the first voltage conversion circuit 211b and the second voltage conversion circuit 212b to operate in the constant current charging phase, and control the third voltage conversion circuit 215 to operate in the trickle charging phase and/or the constant voltage charging phase.
It should be noted that, regarding the third voltage converting circuit 215, when the third voltage converting circuit 215 is connected to only one of the ac-dc converting circuits (for example, the first ac-dc converting circuit 211a or the second ac-dc converting circuit 212a), as shown in fig. 2, the third voltage converting circuit 215 is connected to the first ac-dc converting circuit 211a, and at this time, in the trickle charging stage and/or the constant voltage charging stage, only one charging circuit charges the battery 213 through the third voltage converting circuit 215; when the third voltage converting circuit 215 is connected to two ac/dc converting circuits (e.g., the first ac/dc converting circuit 211a and the second ac/dc converting circuit 212a) at the same time, as shown in fig. 3, the third voltage converting circuit 215 is connected to both the first ac/dc converting circuit 211a and the second ac/dc converting circuit 212a, and at this time, in the trickle charging stage and/or the constant voltage charging stage, two charging circuits may be used to charge the battery 213 at the same time through the third voltage converting circuit 215.
Specifically, the first voltage conversion circuit 211b may be configured to perform DC-DC conversion on the voltage and current output by the first ac-DC conversion circuit 211a, so that the first voltage and the first current obtained by the first voltage conversion circuit 211b can be directly applied to two ends of the battery 213. The second voltage conversion circuit 212b may be configured to perform DC-DC conversion on the voltage and current output by the second ac-DC conversion circuit 212a, so that the second voltage and the second current obtained by the second voltage conversion circuit 212b can be directly applied to two ends of the battery 213. The third voltage conversion circuit 215 may also be configured to perform DC-DC conversion on the voltage and current output by the first ac-DC conversion circuit 211a and/or perform DC-DC conversion on the voltage and current output by the second ac-DC conversion circuit 212a, so that the third voltage and the third current obtained by the third voltage conversion circuit 215 can be directly applied to both ends of the battery 213. Among them, the first voltage conversion circuit 211b and the second voltage conversion circuit 212b are usually operated in a constant current charging stage, and the third voltage conversion circuit 215 is usually operated in a trickle charging stage and/or a constant voltage charging stage.
In some embodiments, on the basis of the device to be charged 20 shown in fig. 2, as shown in fig. 4, the first charging unit 211 may include a first ac-dc conversion circuit 211a, and the second charging unit 212 may include a second ac-dc conversion circuit 212 a; at this time, the device to be charged 20 may further include a fourth voltage conversion circuit 401 and a fifth voltage conversion circuit 402; wherein the content of the first and second substances,
the first control unit 214 is configured to control the fourth voltage conversion circuit 401 to operate in the constant-current charging phase, and control the fifth voltage conversion circuit 402 to operate in the trickle charging phase and/or the constant-voltage charging phase.
The fourth voltage conversion circuit 401 is a Charge pump circuit, and the fifth voltage conversion circuit 402 is a charging IC, a Buck circuit, or a Buck-Boost circuit.
It should be noted that, in fig. 4, the fourth voltage converting circuit 401 is connected to the first ac-dc converting circuit 211a and the second ac-dc converting circuit 212a at the same time, at this time, in the constant current charging phase, there may be two charging paths to charge the battery 213 through the fourth voltage converting circuit 401 at the same time; in fig. 4, the fifth voltage converting circuit 402 is connected to the first ac/dc converting circuit 211a and the second ac/dc converting circuit 212a at the same time, and at this time, in the trickle charging stage and/or the constant voltage charging stage, two charging circuits may be provided to charge the battery 213 at the same time through the fifth voltage converting circuit 402.
Besides, the fifth voltage converting circuit 402 may be connected to only one of the ac-dc converting circuits (the first ac-dc converting circuit 211a or the second ac-dc converting circuit 212a), at which time in the trickle charging phase and/or the constant voltage charging phase, only one charging pass circuit may charge the battery 213 through the fifth voltage converting circuit 402; that is, when the fifth voltage converting circuit 402 is connected to only the first ac/dc converting circuit 211a, in the trickle charging stage and/or the constant voltage charging stage, the battery 213 may be charged by the first charging circuit through the first ac/dc converting circuit 211a and the fifth voltage converting circuit 402; when the fifth voltage converting circuit 402 is connected to only the second ac/dc converting circuit 212a, the battery 213 may be charged by the second charging circuit through the second ac/dc converting circuit 212a and the fifth voltage converting circuit 402 during the trickle charging phase and/or the constant voltage charging phase.
In some embodiments, the first control unit 214 is further configured to generate feedback information according to at least one of the following charging parameters, and feed the feedback information back to the wireless transmitting device: a charging voltage across the battery 213, a charging current of the battery 213, an output current of the first ac/dc conversion circuit 211a, an output voltage of the first ac/dc conversion circuit 211a, an output current of the second ac/dc conversion circuit 212a, and an output voltage of the second ac/dc conversion circuit 212 a.
Specifically, the charging voltage across the battery 213 and the charging current of the battery 213 are used for the wireless transmission apparatus to determine the transmission power; the output current of the first ac/dc conversion circuit 211a, the output voltage of the first ac/dc conversion circuit 211a, the output current of the second ac/dc conversion circuit 212a, and the output voltage of the second ac/dc conversion circuit 212a are used for determining the transmission voltage when the wireless transmission device determines the transmission power.
Further, a first control unit 214 for determining a required charging power based on a charging voltage across the battery and/or a charging current of the battery; and the number of the first and second groups,
and feeding back the required charging power to a wireless transmitting device, so that the wireless transmitting device adjusts the transmitting power of the electromagnetic signal according to the required charging power.
It should be noted that, on the side of the device to be charged 20, if only the charging power is considered, the required charging power can be determined according to the charging voltage across the battery 213 and/or the charging current of the battery 213 at this time; the required charging power may then be sent to the wireless transmitting device to cause the wireless transmitting device to make the transmit power adjustment.
Further, the first control unit 214 is configured to determine a required current according to the output current and/or the output voltage of the first ac-dc conversion circuit, and/or according to the output current and/or the output voltage of the second ac-dc conversion circuit; and the number of the first and second groups,
and feeding back the required current to a wireless transmitting device so that the wireless transmitting device adjusts the transmitting power of the electromagnetic signal according to the required current.
It should be noted that, on the side of the device to be charged 20, if only the heat generation of the receiving coil 210 is considered, at this time, the first required current may be determined according to the output current and/or the output voltage of the first ac-dc conversion circuit 211 a; according to the output current and/or the output voltage of the second ac-dc conversion circuit 212a, a second required current can be determined; according to the first required current and the second required current, the required current can be determined, and then the required current is sent to the wireless transmitting device, so that the wireless transmitting device can adjust the transmitting power.
Here, "the required current may be determined from the first required current and the second required current", specifically, if the required currents on the two charging paths are the same, that is, the first required current and the second required current are the same, at this time, one of the two may be selected as the required current to be determined; if the required currents on the two charging paths are different, namely the first required current is different from the second required current, determining a main charging path from the two charging paths at this time, and then taking the required current on the main charging path as the required current to be determined; the maximum value may also be selected from the first demand current and the second demand current, and the maximum value is used as the demand current to be determined, that is, the demand current on the charging path that generates heat severely is used as the demand current to be determined.
It should be noted that the output current of the ac-dc conversion circuit (including the first ac-dc conversion circuit 211a and/or the second ac-dc conversion circuit 212a) may be the output current of the receiving coil 210, or may be the current on a charging path, such as the current on the first charging path between the receiving coil 210 and the first voltage conversion circuit 211b, or the current on the second charging path between the receiving coil 210 and the second voltage conversion circuit 212 b; that is, the output current of the ac-dc converter circuit is only required to reflect the current of the receiving coil 210, and the embodiment of the present application is not particularly limited.
In addition, since the receiving coil 210 adopts a center-tap manner, two charging paths, i.e., a first charging path in which the first charging unit 211 is located and a second charging path in which the second charging unit 212 is located, can be obtained. Wherein, the relevant parameters (output voltage and/or output current) of each charging channel are acquired separately; however, since there is only one transmitting coil in the wireless transmitting device, the information fed back to the wireless transmitting device can only be the relevant parameter of one of the charging paths. Thus, if the factors such as the number of turns, material, winding manner, processing technique, tap position, etc. of the receiving coil 210 are considered, it can be ensured that the charging powers of the two charging paths are almost the same, i.e. the transmitting power of the wireless transmitting device is evenly distributed; in this case, the required current may be determined from any one of the two charging paths. In practical application, due to the influence of factors such as the number of turns, material, winding manner, processing technique, tap position and the like of the receiving coil 210, the charging powers of the two charging paths are different, and at this time, power distribution is realized through the first control unit, for example, the first charging path distributes one third of power, and the second charging path distributes two thirds of power; at this time, for the required current, because the required currents of the two charging paths are different, the required current on the main charging path can be used as the required current to be determined, or the required current on the charging path with serious heat generation can be used as the required current to be determined; the determined demand current is then sent to the wireless transmitting device to cause the wireless transmitting device to make a transmit power adjustment.
It should be noted that, during the charging process, if the output current of the receiving coil 210 is too large, the receiving coil will generate heat seriously. In some embodiments, the first control unit 214 is further configured to detect an output current of the receiving coil, and compare the detected output current with a preset current requirement range; when the detected output current does not meet the preset current requirement range, the fact that the transmission power of the wireless transmitting device needs to be adjusted is indicated, and the determined required current can be fed back to the wireless transmitting device at the moment, so that the wireless transmitting device can adjust the transmission power of the electromagnetic signal according to the required current.
Here, the preset current demand range indicates a current range output through the receiving coil preset at the current charging stage, for example, the preset current demand range may be 0.95A to 1.05A; in practical application, the preset current demand range is set according to actual conditions, a maximum preset value (for example, 1.05A) and a minimum preset value (for example, 0.95A) may be set at the same time, or only the maximum preset value (for example, 1.05A) may be set, and the embodiment of the present application is not limited specifically.
Further, a first control unit 214 for determining a required charging power based on a charging voltage across the battery and/or a charging current of the battery; determining a required current according to the output current and/or the output voltage of the first alternating current-direct current conversion circuit and/or according to the output current and/or the output voltage of the second alternating current-direct current conversion circuit; and the number of the first and second groups,
determining a required voltage according to the required charging power and the required current;
and feeding back the required voltage to a wireless transmitting device so that the wireless transmitting device adjusts the transmitting power of the electromagnetic signal according to the required voltage.
It should be noted that, on the side of the device to be charged 20, if the charging power and the heat generation of the receiving coil are considered at the same time, the required charging power may be determined according to the relevant parameters of the battery 213 (such as the charging voltage across the battery 213 and/or the charging current of the battery 213); the required current may also be determined according to relevant parameters of the ac-dc conversion circuit (such as the output current and/or the output voltage of the first ac-dc conversion circuit 211a, and/or the output current and/or the output voltage of the second ac-dc conversion circuit 212 a); according to the required charging power and the required current, required voltage can be determined; and then feeding back the required voltage to the wireless transmitting device so as to enable the wireless transmitting device to carry out transmitting power adjustment.
Here, "determining a required voltage according to the required charging power and the required current", specifically, first, determining a first required power of a first charging path and a second required power of a second charging path according to a preset power distribution principle; the required current is determined according to the main charging path or the charging path with serious heat generation; in this way, after the required power (the first required power or the second required power) corresponding to the main charging path or the charging path with serious heat generation is obtained, the required voltage corresponding to the main charging path or the charging path with serious heat generation can be determined, and then the required voltage is used as the required voltage to be determined; or after obtaining a first required current corresponding to the first charging path and a second required current corresponding to the second charging path, according to the first required power and the first required current, a first required voltage corresponding to the first charging path may be determined; according to the second required power and the second required current, a second required voltage corresponding to the second charging channel can be determined; if the main charging path or the charging path with serious heat generation is the first charging path, the required voltage to be determined is the first required voltage; if the main charging path or the charging path with serious heat generation is the second charging path, the required voltage to be determined is the second required voltage; the embodiments of the present application are not particularly limited.
Further, the first control unit 214 is further configured to, after determining the required voltage, compare the required voltage with the currently received output voltage of the first ac-dc conversion circuit and/or the currently received output voltage of the second ac-dc conversion circuit, and determine a voltage difference; and the number of the first and second groups,
and feeding back the voltage difference value to a wireless transmitting device so that the wireless transmitting device adjusts the transmitting power of the electromagnetic signal according to the voltage difference value.
Further, the first control unit 214 is further configured to send feedback information of increasing the transmission voltage or decreasing the transmission voltage to the wireless transmission apparatus.
It should be noted that, on the side of the device to be charged 20, if the charging power and the heat generation of the receiving coil are considered at the same time, after the required voltage is obtained at this time, if the required voltage is obtained according to the first charging path, the required voltage may be compared with the currently received output voltage of the first ac-dc conversion circuit 211a to determine a voltage difference; if the required voltage is obtained according to the second charging path, the required voltage may be compared with the currently received output voltage of the second ac-dc conversion circuit 212a to determine a voltage difference; and then sending the determined voltage difference value to the wireless transmitting device so as to enable the wireless transmitting device to carry out transmission power adjustment.
It is also noted that, on the side of the device to be charged 20, at least one of the following charging parameters is acquired: the output current of the first ac/dc conversion circuit 211a, the output voltage of the first ac/dc conversion circuit 211a, the output current of the second ac/dc conversion circuit 212a, and the output voltage of the second ac/dc conversion circuit 212a may also determine whether the transmission voltage increases or decreases, and at this time, feedback information for increasing the transmission voltage or decreasing the transmission voltage may be generated, and then the feedback information may be sent to the wireless transmitting apparatus to adjust the transmission voltage, so that the wireless transmitting apparatus may adjust the transmission power.
In some embodiments, the first control unit 214 is further configured to:
detecting the battery temperature of the battery 213; and the number of the first and second groups,
when the detected battery temperature is greater than a temperature threshold value and less than a preset temperature value, sending a first instruction to a wireless transmitting device; wherein the first instruction is used for instructing the wireless transmitting device to adjust the transmission power of the electromagnetic signal.
It should be noted that the temperature of the battery 213 may be detected by a temperature sensor, the temperature of the receiving coil 210 may be detected, and even the temperature of the housing of the device to be charged 20 may be detected, which is not particularly limited in the embodiment of the present application. Taking the battery temperature of the battery 213 as an example, the detected battery temperature is compared with a temperature threshold, and when the detected battery temperature is greater than the temperature threshold, it indicates that the battery temperature is too high, at this time, the charging power of the device to be charged may be reduced, that is, a first instruction is sent to the wireless transmitting apparatus, where the first instruction is used to instruct the wireless transmitting apparatus to adjust the transmitting power of the electromagnetic signal, so as to reduce the battery temperature of the battery 213 in the device to be charged.
It should be noted that, when the receiving coil 210 has a center tap, the input voltages of the two charging paths can be made the same theoretically; for example, assuming that the gain between the transmitting coil in the wireless transmitting apparatus and the receiving coil in the device to be charged is 1, since the output current on the receiving coil is the same in both charging paths and the tap is the center tap, the output voltage on each charging path may be half of the input voltage of the inverse rectifier bridge within the wireless transmitting apparatus. However, due to the factors such as the material, winding manner, processing technique, and tap position of the coil itself, it cannot be ensured that the output voltages on the two charging paths are the same, i.e., the charging powers of the two charging paths may be different.
That is, the charging power of each of the two charging paths may be the same or different. Generally, the charging power of each charging path will be different due to the tap position of the coil, the winding manner, and other factors. In addition, the layout design of each charging path in the device to be charged is combined, so that the heat generation of each charging path is different. Therefore, the first control unit can also realize the intelligent control of the charging power of each charging channel according to different heating points of the equipment to be charged.
In some embodiments, the first control unit 214 is further configured to:
detecting the temperature of a first temperature measuring point in the first charging unit 211 and the temperature of a second temperature measuring point in the second charging unit 212; and the number of the first and second groups,
when the temperature of the first temperature measurement point is higher than the temperature threshold, the charging power of the first charging unit 211 is adjusted to obtain an adjusted first voltage and an adjusted first current, and the adjusted first voltage and the adjusted first current are provided to the battery 213 for charging.
Further, the first control unit 214 is further configured to:
when the temperature of the first temperature measuring point is higher than the temperature threshold, the charging path of the first charging unit 211 is closed, and the first charging unit 211 is stopped charging the battery 213.
The first temperature measurement point indicates a temperature measurement point provided at an internal heat generation position of first charging unit 211, and the second temperature measurement point indicates a temperature measurement point provided at an internal heat generation position of second charging unit 212. The temperature of the first temperature measuring point or the temperature of the second temperature measuring point can be detected by the temperature sensor.
It should be further noted that when it is acquired that the temperature in one of the charging units is higher than the temperature threshold, it indicates that the temperature of the charging path in which the charging unit is located is too high, which results in a large loss, and at this time, the charging power of the charging path may be reduced or the charging path may be directly turned off. Assuming that the temperature of the first temperature measurement point is higher than the temperature threshold, the charging power of the first charging unit 211 may be reduced at this time, specifically, the reduction of the charging power of the first charging unit 211 is realized by controlling the duty ratio or the operating frequency of a switching tube of the first voltage conversion circuit 211b, where the first voltage conversion circuit 211b is a buck circuit; in addition, in this process, in order to secure the charging power of the battery side, the reduced charging power may also be added to the second charging unit 212. When the charging path where the first charging unit 211 with an excessively high temperature needs to be turned off, the switching tube of the first ac-dc conversion circuit 211a may be controlled to be turned off, or the switching tube of the first voltage conversion circuit 211b may be controlled to be turned off, so that the first charging path may be turned off, heat generated by the device to be charged is reduced, and charging efficiency is improved.
Accordingly, assuming that the temperature of the second temperature measurement point is higher than the temperature threshold, at this time, the first control unit 214 needs to adjust the charging power of the second charging unit 212 to obtain an adjusted second voltage and an adjusted second current, and provide the adjusted second voltage and the adjusted second current to the battery 213 for charging; specifically, the charging power of the second charging unit 212 can be reduced by controlling the duty ratio or the operating frequency of the switching tube of the second voltage conversion circuit 212b, wherein the second voltage conversion circuit 212b is a buck circuit. In addition, when the temperature of the second charging unit 212 is higher than the temperature threshold, the first control unit 214 may close the charging path of the second charging unit 212 at this time, and stop the second charging unit 212 from charging the battery; specifically, the second charging path can be turned off by controlling the switching tube of the second ac-dc conversion circuit 212a to be turned off, or by controlling the switching tube of the second voltage conversion circuit 212b to be turned off, so that heat generated by the device to be charged is reduced, and the charging efficiency is improved.
In some embodiments, the first control unit 214 is further configured to:
detecting a charging state of the device to be charged 20; and the number of the first and second groups,
when the charging state accords with the abnormal charging state, sending a second instruction to the wireless transmitting device; the second instruction is used for instructing the wireless transmitting device to stop transmitting the electromagnetic signal so as to stop the wireless transmitting device from providing the transmitting power for the equipment to be charged; wherein the abnormal state of charge comprises: the method comprises the following steps that the electric quantity information of the battery is larger than a preset electric quantity value, and/or the battery temperature of the battery is larger than a preset temperature value, and/or the charging voltage at two ends of the battery is larger than a preset voltage value, and/or the charging current of the battery is larger than a preset current value.
It should be noted that the preset temperature value is greater than the temperature threshold value. When the temperature of the battery is greater than the temperature threshold and less than the preset temperature value, the charging state is not in accordance with the abnormal charging state, and a first instruction is sent to the wireless transmitting device to instruct the wireless transmitting device to adjust the transmitting power of the electromagnetic signal; when the battery temperature is higher than the preset temperature value, the charging state is indicated to be in accordance with the abnormal charging state, at this time, a second instruction needs to be sent to the wireless transmitting device to instruct the wireless transmitting device to stop transmitting the electromagnetic signal, so that the wireless transmitting device is stopped providing the transmitting power for the equipment to be charged.
Taking the abnormal charging state that the electric quantity information of the battery is greater than the preset electric quantity value as an example, in the process of charging the device to be charged, the first control unit 214 may further detect the electric quantity of the battery 213, and then determine whether to continue to control the wireless transmitting device to provide the transmitting power to the device to be charged for charging according to the detected electric quantity of the battery. That is to say, the detected battery power is compared with the preset power threshold, and if the detected battery power is greater than the preset power threshold, it indicates that the battery is fully charged, at this time, the charging state may be an abnormal charging state, and a second instruction needs to be sent to the wireless transmitting apparatus, where the second instruction is used to instruct the wireless transmitting apparatus to stop transmitting the electromagnetic signal (i.e., to turn off the signal transmission of the transmitting coil), so as to stop the wireless transmitting apparatus from providing the transmitting power to the device to be charged, thereby stopping charging the battery of the device to be charged. In addition, if the detected electric quantity of the battery is less than the preset electric quantity threshold value, it indicates that the electric quantity of the battery is not fully charged, and at this time, the charging state may be a normal charging state, and a third instruction may be sent to the wireless transmitting apparatus, where the third instruction is used to instruct the wireless transmitting apparatus to continue to provide transmission power to the device to be charged, so as to continue to charge the battery of the device to be charged.
In some embodiments, the first control unit 214 is further configured to:
acquiring the maximum transmitting power of a wireless transmitting device; and the number of the first and second groups,
and when the acquired maximum transmitting power is smaller than a preset power threshold, controlling the first charging unit 211 or the second charging unit 212 to work.
Specifically, after acquiring the maximum transmission power of the wireless transmission device, when the acquired maximum transmission power is smaller than a preset power threshold, the first charging unit 211 is controlled to operate, and the second charging unit 212 does not operate; the first voltage converting circuit 211b is at least one of the following: buck circuit, charging IC or Charge pump circuit and charging IC's integrated circuit. Or, when the acquired maximum transmission power is smaller than the preset power threshold, controlling the second charging unit 212 to operate, and the first charging unit 211 does not operate; the second voltage conversion circuit 212b is at least one of the following: buck circuit, charging IC or Charge pump circuit and charging IC's integrated circuit.
It should be noted that, since the receiving coil adopts a tapped manner, a plurality of charging units can be obtained, but only one of the plurality of charging units may operate. For example, if the maximum transmission power that can be provided by the wireless transmitting apparatus is less than a preset power threshold (e.g., 15W), only the first charging unit 211 or the second charging unit 212 may be controlled to operate at this time. It should be noted that, for the operating charging unit, the voltage conversion circuit included in the charging unit may be a Buck circuit, a charging IC, or an integrated circuit of a Charge pump circuit and the charging IC, and the embodiment of the present application is not limited in particular.
In some embodiments, in each charging path, the ac-dc converting circuit (such as the first ac-dc converting circuit 211a or the second ac-dc converting circuit 212a) may further include a rectifying unit (not shown in fig. 2), wherein,
and the rectifying unit is used for receiving a control signal, and performing alternating current-direct current voltage conversion on one path of electromagnetic signals correspondingly received from the receiving coil 210 according to the control signal to obtain the output voltage and the output current of the alternating current-direct current conversion circuit.
Further, the device to be charged 20 may further comprise a rectification control unit (not shown in fig. 2), wherein,
and the rectification control unit is used for sending a control signal to the rectification unit, and the control signal is used for indicating the rectification unit to carry out alternating current-direct current voltage conversion.
It should be noted that the rectification control unit may be located in the first ac-dc conversion circuit 211a, may be located in the second ac-dc conversion circuit 212a, and may also be located in the first ac-dc conversion circuit 211a and the second ac-dc conversion circuit 212 a. Specifically, when the number of the rectification control units is one, the rectification control unit may be located in the ac-dc conversion circuit in one of the charging paths, and at this time, the rectification control unit sends a control signal to the rectification units in the ac-dc conversion circuits in all the charging paths, and then the control signal is used to control the working state of the rectifier bridge in the rectification unit, so as to implement ac-dc voltage conversion of each charging path; or, when the number of the rectification control units is two, the rectification control units may also be correspondingly located in the first ac-dc conversion circuit 211a and the second ac-dc conversion circuit 212a in the two charging paths, for example, a rectification control unit and a rectification unit are respectively placed in each ac-dc conversion circuit, at this time, the rectification control unit in each ac-dc conversion circuit sends a control signal to the respective rectification unit, and then the control signal is used to control the working state of the rectifier bridge in the rectification unit, so as to implement ac-dc voltage conversion of each charging path.
Besides, the rectification control unit may also be located in the first control unit 214, and the first control unit sends a control signal to the rectification units in the ac-dc conversion circuits in all the charging paths, and then uses the control signal to control the working state of the rectification bridges in the rectification units, so as to implement ac-dc voltage conversion for each charging path. As such, the embodiments of the present application are not particularly limited with respect to the position and number of the rectification control units.
In some embodiments, the device to be charged 20 may further comprise a first communication unit (not shown in fig. 2), wherein,
the first communication unit is configured to establish handshake communication between the device to be charged and the wireless transmitting apparatus, so as to control the wireless transmitting apparatus to provide transmitting power to the device to be charged to charge the battery 213.
Before the device to be charged 20 enters the charging process, it is first required that the device to be charged and the wireless transmitting apparatus can communicate with each other through a charging handshake protocol to establish handshake communication between the device to be charged and the wireless transmitting apparatus. And when the handshake communication is successfully established, the wireless transmitting device can be controlled to provide transmitting power for the equipment to be charged to charge the battery.
It should be further noted that the wireless charging communication protocol in the embodiment of the present application may include a standard charging protocol, such as a Qi protocol, and may also include a non-standard charging protocol, such as a USB-Power Delivery (USB-PD) protocol and a Quick Charge (QC) protocol, and the embodiment of the present application is not limited in particular. In some embodiments, since the wireless transmitting device typically communicates using the standard Qi protocol, the first communication unit of the device to be charged needs to support the standard Qi protocol.
In the embodiment of the present application, the first communication unit may be located in the first charging unit 211, may also be located in the second charging unit 212, and may also be located in the first charging unit 211 and the second charging unit 212. If the number of the first communication units is 1, the first communication unit is located in one of the charging paths (i.e., in the first charging unit 211 or in the second charging unit 212), and at this time, the first communication unit in the first charging unit 211 or in the second charging unit 212 communicates with the wireless transmitting device; or, if the number of the first communication units is two, the first communication units are respectively located in the first charging unit 211 and the second charging unit 212 in the two charging paths, and at this time, the first charging unit 211 and the second charging unit 212 communicate with the wireless transmitting device in a time-sharing communication manner.
Specifically, the first communication unit may be located in the first charging unit 211, where the number of the first communication unit is one, and the first communication unit may communicate with the wireless transmitting device, and at this time, other charging paths (for example, the second charging unit 212) may first send related communication information (for example, charging power information, output voltage information, and output current information) to the first charging unit 211, and then the first communication unit in the first charging unit 211 performs information interaction with the wireless transmitting device; alternatively, the first communication units may be located in the first charging unit 211 and the second charging unit 212, that is, one first communication unit is placed in each charging unit, and at this time, the number of the first communication units is two, and the communication mode is a time-sharing communication mode, that is, each charging unit communicates with the wireless transmitting device in an interlaced manner.
Besides, the first communication unit may also be located in the first control unit 214, and the first control unit establishes handshake communication between the device to be charged and the wireless transmitting apparatus, so as to control the wireless transmitting apparatus to provide the transmitting power to the device to be charged for charging. As such, the embodiments of the present application are not particularly limited to the position and number of the first communication units.
That is, when the device to be charged employs in-band communication, for the plurality of charging paths, one of the charging paths may be selected to communicate with the wireless transmitting device, and the other charging paths do not communicate with the wireless transmitting device; further, the plurality of charging paths may be subjected to communication in a staggered manner, that is, a time-division communication method may be adopted. Besides, the device to be charged can also adopt an out-of-band communication mode, namely, the device to be charged can communicate with the wireless transmitting device through third-party out-of-band communication.
In some embodiments, for each charging path, in order to form an LC resonant circuit by inductance (denoted by L) -capacitance (denoted by C), a resonant capacitor needs to be placed between the receiving coil and each charging unit, such as C shown in fig. 21And C2(ii) a Thus, an LC resonant circuit can be formed by the receiving coil and the resonant capacitor. It is to be noted that, as those skilled in the art will appreciate, the constituent structure of the device to be charged 20 shown in fig. 2 does not constitute a limitation of the device to be charged, and the device to be charged may include more or less components than those shown, or some components may be combined, or a different arrangement of components may be provided.
The above-described embodiments provide a device to be charged, which may include a receiving coil, a first charging unit, and a second charging unit, wherein the receiving coil includes a first end, a second end, and a middle tap; the first charging unit is respectively connected with the first end and the middle tap and is used for converting the electromagnetic signals received by the first end and the middle tap of the receiving coil into a first voltage and a first current for charging a battery; the second charging unit is respectively connected with the second end and the middle tap and is used for converting the electromagnetic signals received by the second end and the middle tap of the receiving coil into a second voltage and a second current for charging the battery; therefore, the receiving coil adopts a tapping mode, so that not only can the coil be enlarged, but also a charging path can be increased, and the charging power of the equipment to be charged can be improved; in addition, because the charging path can have a plurality of, can also make the charging power on each charging path reduce to some extent, so can the dispersion generate heat the point, reduced the charging and generate heat to charging efficiency has been promoted.
Further, the receiving coil 210 may also have a plurality of taps, and at this time, the device to be charged 20 may include a plurality of charging units, thereby forming a plurality of charging paths. That is, referring to fig. 5, a schematic structural diagram of another device to be charged 20 provided in the embodiment of the present application is shown. As shown in fig. 5, when the receiving coil 210 has a plurality of taps, the device to be charged 20 may include:
a receiving coil 210 including a first end a, a second end b, and N taps (1,2, …, N), N being a positive integer greater than 1;
a first charging unit, connected to the first terminal a and a first tap of the N taps, respectively, for converting the electromagnetic signals received by the first terminal and the first tap of the receiving coil 210 into a first voltage and a first current charged by the battery 213;
the ith charging unit is respectively connected with the (i-1) th tap and the ith tap of the N taps and is used for converting the electromagnetic signals received by the (i-1) th tap and the ith tap of the receiving coil 210 into the ith voltage and ith current charged by the battery 213, wherein i is a positive integer greater than 1 and less than or equal to N;
and an N +1 charging unit respectively connected to the nth tap of the N taps and the second terminal b, and configured to convert the electromagnetic signals received by the nth tap and the second terminal of the receiving coil 210 into an N +1 th voltage and an N +1 th current for charging the battery 213.
Furthermore, the kth charging unit comprises a kth alternating current-direct current conversion circuit and a kth voltage conversion circuit, the kth alternating current-direct current conversion circuit is connected with the kth voltage conversion circuit, and k is a positive integer greater than or equal to 1 and less than or equal to N + 1; wherein the content of the first and second substances,
the kth ac-dc conversion circuit is configured to perform ac-dc voltage conversion on the kth electromagnetic signal correspondingly received from the receiving coil 210 to obtain an output voltage and an output current of the kth ac-dc conversion circuit;
and the kth voltage conversion circuit is used for performing direct current-direct current voltage conversion on the output voltage and the output current of the kth alternating current-direct current conversion circuit to obtain the kth voltage and the kth current for charging the battery 213.
Wherein, in FIG. 5, the resonant capacitor comprises a plurality of capacitors, such as C1、C2、…、CN+1Respectively connected to the receiving coil 210 and the charging unit (e.g. the first charging unit U)1A second charging unit U2…, N +1 charging unit UN+1) For forming a plurality of charging paths; here, in the first charging path, the first charging unit U1The charging circuit comprises a first alternating current-direct current conversion circuit and a first voltage conversion circuit, wherein the first alternating current-direct current conversion circuit is connected with the first voltage conversion circuit, and the first voltage conversion circuit is connected to a battery 213 and can charge the battery 213; in the second charging path, a second charging unit U2The charging circuit comprises a second alternating current-direct current conversion circuit and a second voltage conversion circuit, wherein the second alternating current-direct current conversion circuit is connected with the second voltage conversion circuit, and the second voltage conversion circuit is connected to the battery 213 and can charge the battery 213; in the N +1 th charging path, the N +1 th charging unit UN+1The device comprises an N +1 th alternating current-direct current conversion circuit and an N +1 th voltage conversion circuit, wherein the N +1 th alternating current-direct current conversion circuit is connected with the N +1 th voltage conversion circuit, and the N +1 th voltage conversion circuit is connected to the battery 213 and can charge the battery 213.
That is, when the receiving coil 210 has a plurality of taps, the received electromagnetic signal may be divided into a plurality of electromagnetic signals by the plurality of taps, and each of the plurality of electromagnetic signals is input to the plurality of charging units to form a plurality of charging paths.
In the embodiment of the present application, since the receiving coil 210 adopts a tapping manner, a plurality of charging paths can be formed, and each charging path can charge the battery 213, so that the charging power of the device to be charged 20 can be increased; in addition, because there are a plurality of charging paths, can also make the charging power on each charging path reduce to some extent, so can disperse the point that generates heat, reduce to charge and generate heat to charging efficiency has been promoted.
In some embodiments, the battery 213 may include a single cell or a plurality of cells. When the battery 213 includes a plurality of cells, the plurality of cells may further include a multi-cell series structure and a multi-cell parallel structure.
When the battery 213 includes a plurality of battery cells, voltages and currents of a plurality of charging units may be applied to two ends of the plurality of battery cells together for charging, or each charging unit may charge one battery cell. In the embodiment of the present application, no limitation is imposed on the form and circuit structure of how the plurality of charging units charge the plurality of battery cells.
Further, as shown in fig. 6, the battery 213 includes a battery cell 1, a battery cell 2, …, a battery cell N +1, and the like, where the battery cell 1, the battery cell 2, …, and the battery cell N +1 are in a parallel relationship; at this time, the kth cell in the multiple cells is connected with the kth voltage conversion circuit in the kth charging unit to control each charging path to charge corresponding to each cell; wherein k is a positive integer greater than or equal to 1 and less than or equal to N + 1.
Specifically, a first voltage conversion circuit in the first charging path is connected to the battery cell 1, a second voltage conversion circuit in the second charging path is connected to the battery cells 2 and …, and an N +1 voltage conversion circuit in the N +1 charging path is connected to the battery cell N + 1; so, can make first charging path charge for electric core 1, the second charging path charges for electric core 2, and the (N + 1) th charging path charges for electric core N +1 to can improve the charging speed.
In addition, in order to ensure the charging speed and further alleviate the heat generation phenomenon of the device to be charged 20, the battery 213 inside the device to be charged 20 may also be a multi-cell series structure, that is, multiple cells (for example, cell 1, cell 2, …, cell N +1, etc.) are in a series relationship. Compared with the single-cell scheme, if the same charging speed is achieved, the charging current required by the multi-cell series structure is 1/K (K is the number of the cells which are connected in series with each other in the device 20 to be charged) of the charging current required by a single cell; that is to say, on the premise of ensuring the same charging speed, the embodiment of the present application can greatly reduce the magnitude of the charging current, thereby further reducing the heat generation amount of the device to be charged 213 during the charging process.
It should be noted that the multiple battery cells may be battery cells with the same or similar specifications and parameters, the battery cells with the same or similar specifications are convenient for unified management, and the overall performance and the service life of the multiple battery cells can be improved by selecting the battery cells with the same or similar specifications and parameters.
The above-described embodiments provide a device to be charged, which may include a receiving coil, a first charging unit, and a second charging unit, wherein the receiving coil includes a first end, a second end, and N taps; the first charging unit is respectively connected with the first end a and a first tap of the N taps and is used for converting the electromagnetic signals received by the first end a and the first tap of the receiving coil into a first voltage and a first current for charging the battery; the ith charging unit is respectively connected with an i-1 th tap and an ith tap of the N taps and is used for converting electromagnetic signals received by the i-1 th tap and the ith tap of the receiving coil into an ith voltage and an ith current for charging the battery, wherein i is a positive integer which is greater than 1 and less than or equal to N; the (N + 1) th charging unit is respectively connected with the (N) th tap and the second end b of the (N) taps and is used for converting the electromagnetic signals received by the (N) th tap and the second end of the receiving coil into (N + 1) th voltage and (N + 1) th current for charging the battery; therefore, the receiving coil adopts a tapping mode, so that not only can the coil be enlarged, but also a charging path can be increased, and the charging power of the equipment to be charged can be improved; in addition, because the charging path can have a plurality of, can also make the charging power on each charging path reduce to some extent, so can the dispersion generate heat the point, reduced the charging and generate heat to charging efficiency has been promoted.
Referring to fig. 7, a schematic diagram of a composition structure of a wireless charging system 50 provided in an embodiment of the present application is shown; as shown in fig. 7, the wireless charging system 50 includes a power supply device 510, a wireless transmitting device 520, and the device to be charged 20 of any one of the foregoing embodiments.
A power supply device 510 for supplying power to the wireless transmitting apparatus 520. The power supply device 510 may include: the rectifying unit, the transforming unit, the control unit, the charging interface and the like can convert the alternating current input into the direct current output to be provided to the wireless transmitting device 520. For example, the power supply device 510 may be an adapter, a power pack, a vehicle power supply, or the like.
In some embodiments, the power supply apparatus 510 may also directly supply alternating current to the wireless transmitting device 520. For example, the power supply 510 may be an ac power supply. When the power supply device 510 is an ac power supply, the wireless transmission apparatus 520 further includes a unit or a module for converting ac power into DC power, such as an inverse rectifier filter unit and a DC/DC conversion unit.
The wireless transmitting device 520 is configured to convert the direct current or alternating current provided by the power supply device 510 into a wireless charging signal (electromagnetic signal) for power transmission in a wireless manner.
In some embodiments, as shown in fig. 7, the wireless transmitting device 520 may include a fourth voltage converting circuit 521, an inverse rectifying circuit 522, a transmitting coil 523, and a second control unit 524. Those skilled in the art will appreciate that the component structure of the wireless transmitting device 520 shown in fig. 7 does not constitute a limitation of the wireless transmitting device, and that the wireless transmitting device may include more or less components than those shown, or some components may be combined, or a different arrangement of components.
It should be noted that the power supply device 510 may be a common adapter, may also be a voltage regulation adapter (that is, the adapter itself can adjust the magnitude of the output voltage), and may even be a mobile power supply, etc.; if the power supply 510 is a voltage-regulating adapter, the wireless transmitting device 520 may eliminate the fourth voltage converting circuit 521. Here, the fourth voltage converting circuit 521 is used to perform direct current-direct current (DC/DC) voltage conversion, mainly to adjust the output voltage of the power supply apparatus 510 to a fixed voltage value and supply it to the inverse rectifying circuit 522.
An inverse rectification circuit 522 for converting the dc power provided by the fourth voltage conversion circuit 521 or the dc power provided by the power supply device 510 into ac power that can be coupled to the transmitting coil, and then providing the ac power to the transmitting coil 523, and converting the ac power into an electromagnetic signal through the transmitting coil 523 for transmission.
In some embodiments, the inverse rectification circuit 522 may include a plurality of switching tubes (or referred to as inverse rectification bridges), and the magnitude of the transmission power may be adjusted by controlling the conduction time (i.e., duty ratio) of the switching tubes. That is, the wireless transmitting device 520 may further include an inverse rectification control unit 525 for sending a control signal to the inverse rectification circuit 522, where the control signal is used to control the conduction time (i.e., duty ratio) of the switching tube, so as to adjust the transmitting power. Here, the inverse rectification control unit 525 may be a separate control unit, or may be integrated in the second control unit 524, and the embodiment of the present application is not particularly limited.
In some embodiments, the wireless transmitting device 520 may further include a resonant capacitor C3, and an LC resonant circuit is formed by the resonant capacitor C3 and the transmitting coil 523; the amount of power transmitted by wireless transmitting device 520 may also be adjusted at this time by the operating frequency of the LC resonant circuit.
In some embodiments, the wireless transmitting device 520 may be a wireless charging base or a device with an energy storage function, etc. When the wireless transmitting apparatus 520 is a device with an energy storage function, it may further include an energy storage module (e.g., a lithium battery, etc.), and at this time, electric energy is obtained from the external power supply device 510 and stored. Thus, the energy storage module may also provide electrical energy to the reverse rectification circuit 522. Those skilled in the art will appreciate that the wireless transmitting device 520 may obtain power from the external power supply 510 by wire or wirelessly. Wherein, in a wired manner, for example, the power supply device 510 is connected to a charging interface (e.g., a Type-C interface or a USB interface, etc.) to obtain electric energy; the wireless transmitting device 520 may further include a receiving coil, which may wirelessly obtain power from the device having the wireless charging function.
A second control unit 524, configured to control the wireless charging process. For example, the second control unit 524 may communicate with the power supply device 210 to determine the output voltage and/or the output current of the power supply device. Alternatively, the second control unit 524 may also communicate with the device to be charged 20, implement interaction of charging information (e.g., battery voltage information, battery current information, battery temperature information, battery level information, etc. of the battery 213 within the device to be charged 20), and determination of charging parameters (e.g., charging voltage and/or charging current) for wireless charging, etc.
Those skilled in the art will appreciate that the wireless transmitting device 520 may also include other relevant hardware, logic devices, units and/or code to achieve the corresponding functionality. For example, the wireless transmitting device 520 may further include a display unit (e.g., a light emitting diode or an LED display screen) for displaying the charging status in real time (e.g., charging is in progress or terminated, etc.) during the wireless charging process, and the embodiment of the present invention is not limited in particular.
In some embodiments, as shown in fig. 7, the device to be charged 20 includes a receiving coil 210, a first charging unit 211 and a second charging unit 212, wherein the receiving coil 210 includes a first end a, a second end b and a middle tap c for receiving the electromagnetic signal transmitted by the transmitting coil 523; a first charging unit 211 connected to the first end a and the middle tap c, respectively, for converting the electromagnetic signals received by the first end a and the middle tap c of the receiving coil 210 into a first voltage and a first current for charging the battery 213; and a second charging unit 212, connected to the second end b and the middle tap c, respectively, for converting the electromagnetic signals received by the second end b and the middle tap c of the receiving coil into a second voltage and a second current for charging the battery 213.
Here, the first charging unit 211 may include a first ac/dc conversion circuit 211a and a first voltage conversion circuit 211b, the second charging unit 212 includes a second ac/dc conversion circuit 212a and a second voltage conversion circuit 212b, and the device to be charged 20 may further include a first control unit 214 for controlling the first ac/dc conversion circuit and the first voltage conversion circuit to operate and/or controlling the second ac/dc conversion circuit and the second voltage conversion circuit to operate according to a charging mode or a charging phase of the battery 213; the charging mode comprises a first charging mode and a second charging mode, the charging speed of the first charging mode is greater than that of the second charging mode, and the charging phase of the battery at least comprises one of the following charging phases: a trickle charge phase, a constant current charge phase and a constant voltage charge phase.
Those skilled in the art will appreciate that the device to be charged 20 shown in fig. 7 may also include other related hardware, logic devices, units and/or code to achieve the corresponding functions. That is, the constituent structure of the device to be charged 20 does not constitute a limitation of the device to be charged, and the device to be charged may include more or less components than those shown in the drawings, or combine some components, or arrange different components.
It should be noted that the power supply device 510 provides power supply for the wireless transmitting device 520, the device to be charged 20 is placed on the surface of the wireless transmitting device 520, and the wireless transmitting device 520 charges the battery 213 in the device to be charged 20 through electromagnetic induction. Here, a wireless connection is established between the wireless transmitting device 520 and the device to be charged 20, and the two can also communicate with each other.
In some embodiments, the manner of Wireless communication includes, but is not limited to, bluetooth communication, Wireless Fidelity (WiFi) communication, high carrier frequency based short-range Wireless communication, optical communication, ultrasonic communication, ultra-wideband communication, mobile communication, and the like. The embodiments of the present application are not particularly limited.
Thus, when the wireless transmitter 520 transmits an electromagnetic signal through the transmitter 523, that is, the wireless transmitter 520 will have an ac power to transmit, a current in one direction will be generated at the receiver 210 according to the electromagnetic induction between the transmitter 523 and the receiver 210; for example, if a counterclockwise current is generated, for each ac/dc conversion circuit inside the device to be charged 20, the rectifier bridge included in the internal rectifying unit is in a reverse operation mode, and each rectifying unit respectively rectifies a voltage and inputs the rectified voltage to a voltage conversion circuit (such as the first voltage conversion circuit, the second voltage conversion circuit, or the third voltage conversion circuit), so as to obtain a charging voltage and/or a charging current expected by the battery 213 inside the device to be charged 20 by continuing dc-dc voltage conversion.
For the device to be charged 20, the first control unit 214 is further configured to generate feedback information according to at least one of the following charging parameters, and feed the feedback information back to the wireless transmitting apparatus 520: the charging voltage at two ends of the battery, the charging current of the battery, the output current of the first alternating current-direct current conversion circuit, the output voltage of the first alternating current-direct current conversion circuit, the output current of the second alternating current-direct current conversion circuit and the output voltage of the second alternating current-direct current conversion circuit; wherein the content of the first and second substances,
the charging voltage across the battery and the charging current of the battery for the wireless transmitting device 520 to determine the transmit power;
the output current of the first ac-dc converting circuit, the output voltage of the first ac-dc converting circuit, the output current of the second ac-dc converting circuit, and the output voltage of the second ac-dc converting circuit are used for the wireless transmitting device 520 to determine the transmitting voltage when determining the transmitting power.
For the wireless transmitting apparatus 520, the second control unit 524 is further configured to receive the feedback information sent by the first control unit in the device to be charged 20, and adjust the transmitting power of the wireless transmitting apparatus 520 according to the feedback information.
The following will specifically describe the transmission power adjustment of the wireless transmission apparatus 520.
In some embodiments, the second control unit 524 is specifically configured to:
adjusting the duty ratio of a switching tube of the wireless transmitting device according to the feedback information so as to adjust the transmitting power of the wireless transmitting device; alternatively, the first and second electrodes may be,
adjusting the working frequency of the wireless transmitting device according to the feedback information so as to adjust the transmitting power of the wireless transmitting device; alternatively, the first and second electrodes may be,
and adjusting the transmission voltage of the wireless transmitting device according to the feedback information so as to adjust the transmission power of the wireless transmitting device.
It should be noted that, based on the communication between the wireless transmitting apparatus 520 and the device to be charged 20, when the transmitting power of the wireless transmitting apparatus 520 does not satisfy the charging power required by the battery in the device to be charged 20, the wireless transmitting apparatus 520 may adjust the transmitting power of the wireless transmitting apparatus through the received feedback information, so that the transmitting power of the wireless transmitting apparatus satisfies the charging power required by the battery in the device to be charged; or when the output current of the receiving coil in the device to be charged does not meet the preset current demand range, the wireless transmitting device can also adjust the transmitting power of the wireless transmitting device through the received feedback information, so that the output current of the receiving coil in the device to be charged meets the preset current demand range; like this, through adjusting transmission power, can make wireless transmitting device's transmission power satisfy the charging power that the interior battery of rechargeable devices required to and make the output current of the interior receiving coil of rechargeable devices satisfy and predetermine the electric current demand scope, thereby can reduce the equipment of rechargeable devices that charges and generate heat, improved charge efficiency.
It should be noted that, in conjunction with the wireless charging system shown in fig. 7, the wireless transmitting device 520 includes a voltage converting unit (for example, the fourth voltage converting circuit 521 shown in fig. 7) therein, and the transmitting voltage of the wireless transmitting device 520 is controlled by feedback information to be adjusted. Specifically, the second control unit 524 may control the fourth voltage converting circuit 521, so that the output voltage of the fourth voltage converting circuit 521 changes, thereby adjusting the transmitting voltage; the second control unit 524 may also adjust the input voltage of the fourth voltage converting circuit 521 (for example, adjust the output voltage of the power supply device 510 shown in fig. 7), or may also change the output voltage of the fourth voltage converting circuit 521, so as to adjust the transmitting voltage, and thus adjust the transmitting power; besides, the second control unit 524 (or the inverse rectification control unit 525) may adjust the duty ratio of the switching tube of the inverse rectification circuit 522, or even the second control unit 524 may adjust the operating frequency of the resonant circuit in the wireless transmitting apparatus 520, so as to adjust the transmitting power. In practical applications, specific settings are performed according to practical situations, and this is not specifically limited in the embodiments of the present application.
And in particular, based on the communication between the device to be charged 20 and the wireless transmission means 520,
in some embodiments, a first control unit 214 for determining a required charging power based on a charging voltage across the battery and/or a charging current of the battery; feeding back the required charging power to the wireless transmitting device;
a second control unit 524, configured to receive the required charging power, and control the transmitting power of the wireless transmitting apparatus to adjust according to the required charging power, so that the adjusted transmitting power meets the required charging power of a battery in the device to be charged.
In some embodiments, the first control unit 214 is configured to determine a required current according to the output current and/or the output voltage of the first ac-dc converting circuit and/or according to the output current and/or the output voltage of the second ac-dc converting circuit; and feeding back the required current to the wireless transmitting device;
the second control unit 524 is configured to receive the required current, and control the transmission power of the wireless transmitting apparatus to adjust according to the required current, so that the output current of the receiving coil in the device to be charged meets a preset current required range.
In some embodiments, a first control unit 214 for determining a required charging power based on a charging voltage across the battery and/or a charging current of the battery; determining a required current according to the output current and/or the output voltage of the first alternating current-direct current conversion circuit and/or according to the output current and/or the output voltage of the second alternating current-direct current conversion circuit; determining a required voltage according to the required charging power and the required current, and feeding back the required voltage to the wireless transmitting device;
the second control unit 524 is configured to receive the required voltage, and control the transmission power of the wireless transmitting apparatus to adjust according to the required voltage, so that the adjusted transmission power meets a required charging power of a battery in the device to be charged, and an output current of a receiving coil in the device to be charged meets a preset current required range.
In some embodiments, the first control unit 214 is further configured to, after determining the required voltage, compare the required voltage with a currently received output voltage of the first ac-dc conversion circuit and/or an output voltage of the second ac-dc conversion circuit to determine a voltage difference; feeding the voltage difference value back to the wireless transmitting device;
the second control unit 524 is further configured to receive the voltage difference, and control the transmitting power of the wireless transmitting apparatus to adjust according to the voltage difference, so that the adjusted transmitting power meets a required charging power of a battery in the device to be charged, and an output current of a receiving coil in the device to be charged meets a preset current required range.
In some embodiments, the first control unit 214 is further configured to send feedback information of increasing or decreasing the transmission voltage to the wireless transmission apparatus;
the second control unit 524 is further configured to receive feedback information of increasing the transmission voltage or decreasing the transmission voltage, and control the transmission power of the wireless transmitting apparatus to adjust by adjusting the transmission voltage, so that the adjusted transmission power meets a required charging power of a battery in the device to be charged, and an output current of a receiving coil in the device to be charged meets a preset current required range.
In some embodiments, the first control unit 214 is further configured to detect a battery temperature of the battery; when the detected battery temperature is greater than a temperature threshold value and less than a preset temperature value, sending a first instruction to the wireless transmitting device;
the second control unit 524 is further configured to receive the first instruction, and adjust the transmission power of the wireless transmitting apparatus according to the first instruction, so as to reduce the battery temperature of the battery in the device to be charged.
In some embodiments, the first control unit 214 is further configured to detect a charging state of the device to be charged; and when the charging state conforms to an abnormal charging state, sending a second instruction to the wireless transmitting device; wherein the abnormal state of charge comprises: the electric quantity information of the battery is larger than a preset electric quantity value, and/or the battery temperature of the battery is larger than a preset temperature value, and/or the charging voltage at two ends of the battery is larger than a preset voltage value, and/or the charging current of the battery is larger than a preset current value;
the second control unit 524 is further configured to receive the second instruction, and control the wireless transmitting apparatus to stop transmitting the electromagnetic signal according to the second instruction, so as to stop the wireless transmitting apparatus from providing the transmission power to the device to be charged.
In some embodiments, the first control unit 214 is further configured to obtain a maximum transmission power of the wireless transmitting apparatus; when the acquired maximum transmitting power is smaller than a preset power threshold, controlling the first charging unit to work, and controlling the second charging unit not to work; wherein the first voltage conversion circuit is at least one of: a Buck circuit, a charging IC or a Charge pump circuit, and an integrated circuit of the charging IC; alternatively, the first and second electrodes may be,
when the acquired maximum transmitting power is smaller than a preset power threshold, controlling the second charging unit to work, and controlling the first charging unit not to work; wherein the second voltage conversion circuit is at least one of: buck circuit, charging IC or Charge pump circuit and charging IC's integrated circuit.
The embodiment provides a wireless charging system, which comprises a power supply providing device, a wireless transmitting device and a device to be charged; the power supply device provides power supply for the wireless transmitting device, and the wireless transmitting device charges a battery in the equipment to be charged; in the charging process of the equipment to be charged, the equipment to be charged is placed on the surface of the wireless transmitting device, and energy is transmitted between the equipment to be charged and the wireless transmitting device in an electromagnetic induction mode so as to charge a battery in the equipment to be charged; because the receiving coil in the equipment to be charged adopts a tapping mode, a plurality of charging paths can be formed, and each charging path can charge the battery, thereby improving the charging power of the equipment to be charged; in addition, because there are a plurality of charging paths, can also make the charging power on each charging path reduce to some extent, so can disperse the point that generates heat, reduce to charge and generate heat to charging efficiency has been promoted.
Based on the wireless charging system shown in fig. 7, refer to fig. 8, which shows a flowchart of a wireless charging method provided in an embodiment of the present application. As shown in fig. 8, the method may include:
s801: receiving an electromagnetic signal by a receiving coil; the receiving coil comprises a first end, a second end and a middle tap, the first charging unit is respectively connected with the first end and the middle tap, and the second charging unit is respectively connected with the second end and the middle tap;
s802: converting, by the first charging unit, electromagnetic signals received by the first end and the center tap of the receiving coil into a first voltage and a first current for charging a battery;
s803: converting, by the second charging unit, electromagnetic signals received by the second end and the center tap of the receiving coil into a second voltage and a second current for charging a battery;
s804: providing the first voltage and the first current and the second voltage and the second current to the battery for charging.
It should be noted that the wireless charging method is applied to the device to be charged described in any one of the foregoing embodiments. In the device to be charged, the receiving coil is provided with a center tap, the received electromagnetic signals can be divided into two paths of electromagnetic signals through the center tap, and the two paths of electromagnetic signals are correspondingly input into the first charging unit and the second charging unit, so that two charging paths can be formed.
In the embodiment of the application, because the receiving coil adopts a tapping mode, a plurality of charging paths can be formed, and each charging path can charge the battery, so that the charging power of the equipment to be charged can be improved; in addition, because there are a plurality of charging paths, can also make the charging power on each charging path reduce to some extent, so can disperse the point that generates heat, reduce to charge and generate heat to charging efficiency has been promoted.
In some embodiments, the method may further comprise:
controlling the first charging unit and/or the second charging unit to work through the first control unit according to a charging mode or a charging stage of the battery so as to charge the battery;
wherein the charging modes include a first charging mode and a second charging mode, a charging speed of the first charging mode is greater than a charging speed of the second charging mode, and a charging phase of the battery includes at least one of: a trickle charge phase, a constant current charge phase and a constant voltage charge phase.
Further, the first charging unit includes a first ac/dc conversion circuit and a first voltage conversion circuit, the second charging unit includes a second ac/dc conversion circuit and a second voltage conversion circuit, and the controlling the first charging unit and/or the second charging unit by the first control unit according to the charging mode or the charging phase of the battery may include:
and controlling the first alternating current-direct current conversion circuit and the first voltage conversion circuit to work and/or controlling the second alternating current-direct current conversion circuit and the second voltage conversion circuit to work through a first control unit according to the charging mode or the charging stage of the battery.
It should be noted that the first ac-dc conversion circuit or the second ac-dc conversion circuit may be configured to perform ac-dc voltage conversion on a path of electromagnetic signals correspondingly received from the receiving coil to obtain a dc voltage and a dc current; the first voltage conversion circuit or the second voltage conversion circuit may be configured to perform dc-dc voltage conversion on the dc voltage and the dc current to obtain an output voltage and an output current corresponding to each charging unit, for example, a first voltage and a first current output by the first charging unit, and a second voltage and a second current output by the second charging unit; the first voltage and the first current and the second voltage and the second current are then provided to the battery for charging.
It should be noted that the first control Unit may be a separate Micro Controller Unit (MCU) in the device to be charged, so as to improve the reliability of the control. In some embodiments, the first control unit may also be an Application Processor (AP) in the device to be charged, so that hardware cost can be saved. The embodiments of the present application are not particularly limited.
Further, in some embodiments, the first voltage conversion circuit is a Buck circuit, a charging IC, or a Buck-Boost circuit, and the method may further include:
controlling the first voltage conversion circuit to work in one or more of the following charging phases through the first control unit: the trickle charge phase, the constant current charge phase, and the constant voltage charge phase.
Further, in some embodiments, the second voltage converting circuit is a Charge pump circuit, and the method may further include:
and controlling the second voltage conversion circuit to work in the constant current charging stage through the first control unit.
Further, in some embodiments, the first voltage conversion circuit and the second voltage conversion circuit are both Charge pump circuits, and the device to be charged may further include a third voltage conversion circuit, and the method may further include:
when the battery is in a constant current charging stage, the first control unit controls the first voltage conversion circuit and the second voltage conversion circuit to work;
when the battery is in the trickle charge stage and/or the constant voltage charge stage, the first control unit controls the third voltage conversion circuit to work.
It should be noted that the first voltage conversion circuit and the second voltage conversion circuit may be both Charge pump circuits, and the third voltage conversion circuit may be a charging IC, a Buck circuit, or a Buck-Boost circuit. The first voltage conversion circuit may be configured to perform DC-DC conversion on the voltage and the current output by the first ac-DC conversion circuit, so that the first voltage and the first current output by the first charging unit can be directly applied to two ends of the battery. The second voltage conversion circuit may be configured to perform DC-DC conversion on the voltage and the current output by the second ac-DC conversion circuit, so that the second voltage and the second current output by the second charging unit can be directly applied to both ends of the battery. The third voltage conversion circuit may also be configured to implement DC-DC conversion on the voltage and current output by the first ac-DC conversion circuit, and/or perform DC-DC conversion on the voltage and current output by the second ac-DC conversion circuit, so that the third voltage and the third current output by the charging path can be directly applied to two ends of the battery.
It should also be noted that the charging phase of the battery in the device to be charged may include a trickle charging phase, a constant current charging phase and a constant voltage charging phase. The first voltage conversion circuit and the second voltage conversion circuit are normally operated in a constant current charging stage, and the third voltage conversion circuit is normally operated in a trickle charging stage and a constant voltage charging stage.
In some embodiments, the device to be charged may further include a fourth voltage conversion circuit and a fifth voltage conversion circuit, and the method may further include:
when the battery is in a constant current charging stage, the fourth voltage conversion circuit is controlled to work by the first control unit;
when the battery is in the trickle charge stage and/or the constant voltage charge stage, the fifth voltage conversion circuit is controlled to work by the first control unit.
It should be noted that the fourth voltage conversion circuit is a Charge pump circuit, and the fifth voltage conversion circuit is a charging IC, a Buck circuit, or a Buck-Boost circuit. Taking fig. 4 as an example, in fig. 4, the fourth voltage converting circuit 401 is connected to the first ac-dc converting circuit 211a and the second ac-dc converting circuit 212a at the same time, and at this time, in the constant current charging phase, there may be two charging paths to charge the battery 213 through the fourth voltage converting circuit 401 at the same time; in fig. 4, the fifth voltage converting circuit 402 is connected to the first ac/dc converting circuit 211a and the second ac/dc converting circuit 212a at the same time, and at this time, in the trickle charging stage and/or the constant voltage charging stage, two charging circuits may be provided to charge the battery 213 at the same time through the fifth voltage converting circuit 402.
Besides, the fifth voltage converting circuit 402 may be connected to only one of the ac-dc converting circuits (the first ac-dc converting circuit 211a or the second ac-dc converting circuit 212a), at which time in the trickle charging phase and/or the constant voltage charging phase, only one charging pass circuit may charge the battery 213 through the fifth voltage converting circuit 402; that is, when the fifth voltage converting circuit 402 is connected to only the first ac/dc converting circuit 211a, in the trickle charging stage and/or the constant voltage charging stage, the battery 213 may be charged by the first charging circuit through the first ac/dc converting circuit 211a and the fifth voltage converting circuit 402; when the fifth voltage converting circuit 402 is connected to only the second ac/dc converting circuit 212a, the battery 213 may be charged by the second charging circuit through the second ac/dc converting circuit 212a and the fifth voltage converting circuit 402 during the trickle charging phase and/or the constant voltage charging phase.
In some embodiments, the device to be charged may further include a first communication unit, and for S801, before receiving the electromagnetic signal through the receiving coil, the method may further include:
establishing, by the first communication unit, handshake communication with a wireless transmitting device;
and when the handshake communication is successfully established, controlling the wireless transmitting device to provide transmitting power for the equipment to be charged so as to charge the battery.
Before the device to be charged enters the charging process, it is first required that the device to be charged and the wireless transmitting apparatus can communicate with each other to establish a charging handshake protocol, so as to establish handshake communication between the device to be charged and the wireless transmitting apparatus. When the handshake communication is successfully established, the wireless transmitting device can be controlled to provide transmitting power for the equipment to be charged for charging. Here, the transmitting power provided by the wireless transmitting device to the device to be charged is converted into an electromagnetic signal by the transmitting coil and transmitted outwards, and then the electromagnetic signal is received by the receiving coil.
As such, based on the communication between the device to be charged and the wireless transmitting apparatus, in some embodiments, the method may further comprise:
generating, by the first control unit, feedback information according to at least one of the following charging parameters, and feeding back the feedback information to the wireless transmitting device; wherein the charging parameters include: the charging voltage at two ends of the battery, the charging current of the battery, the output current of the first alternating current-direct current conversion circuit, the output voltage of the first alternating current-direct current conversion circuit, the output current of the second alternating current-direct current conversion circuit and the output voltage of the second alternating current-direct current conversion circuit.
It should be noted that the charging voltage across the battery and the charging current of the battery may be used for the wireless transmitting apparatus to determine the transmitting power; the output current of the first alternating current-direct current conversion circuit, the output voltage of the first alternating current-direct current conversion circuit, the output current of the second alternating current-direct current conversion circuit and the output voltage of the second alternating current-direct current conversion circuit can be used for determining the transmission voltage when the wireless transmitting device determines the transmission power.
Further, if only charging power is considered, in some embodiments, the feeding back the feedback information to the wireless transmitting apparatus may include:
determining required charging power according to the charging voltage at two ends of the battery and/or the charging current of the battery;
and feeding back the required charging power serving as the feedback information to a wireless transmitting device, so that the wireless transmitting device adjusts the transmitting power of the electromagnetic signal according to the required charging power.
Further, if only the heat generation of the receiving coil is considered, in some embodiments, the feeding back the feedback information to the wireless transmitting apparatus may include:
determining a required current according to the output current and/or the output voltage of the first alternating current-direct current conversion circuit and/or according to the output current and/or the output voltage of the second alternating current-direct current conversion circuit;
and feeding back the required current as the feedback information to a wireless transmitting device, so that the wireless transmitting device adjusts the transmitting power of the electromagnetic signal according to the required current.
Further, if both the charging power and the heat generation of the receiving coil are considered, in some embodiments, the feeding back the feedback information to the wireless transmitting apparatus may include:
determining required charging power according to the charging voltage at two ends of the battery and/or the charging current of the battery;
determining a required current according to the output current and/or the output voltage of the first alternating current-direct current conversion circuit and/or according to the output current and/or the output voltage of the second alternating current-direct current conversion circuit;
determining a required voltage according to the required charging power and the required current;
and feeding back the required voltage serving as the feedback information to a wireless transmitting device, so that the wireless transmitting device adjusts the transmitting power of the electromagnetic signal according to the required voltage.
Further, if the charging power and the heat generation of the receiving coil are simultaneously considered, after determining the required voltage, the method may further include:
according to the determined required voltage, comparing the required voltage with the currently received output voltage of the first alternating current-direct current conversion circuit and/or the output voltage of the second alternating current-direct current conversion circuit, and determining a voltage difference value;
and feeding back the voltage difference value as the feedback information to a wireless transmitting device so that the wireless transmitting device adjusts the transmitting power of the electromagnetic signal according to the voltage difference value.
It should be noted that, on the side of the device to be charged 20, if the charging power and the heat generation of the receiving coil are considered at the same time, after the required voltage is obtained at this time, if the required voltage is obtained according to the first charging path, the required voltage may be compared with the currently received output voltage of the first ac-dc conversion circuit 211a to determine a voltage difference; if the required voltage is obtained according to the second charging path, the required voltage may be compared with the currently received output voltage of the second ac-dc conversion circuit 212a to determine a voltage difference; and then sending the determined voltage difference value to the wireless transmitting device so as to enable the wireless transmitting device to carry out transmission power adjustment.
It is also noted that, on the side of the device to be charged 20, at least one of the following charging parameters is acquired: the output current of the first ac/dc conversion circuit 211a, the output voltage of the first ac/dc conversion circuit 211a, the output current of the second ac/dc conversion circuit 212a, and the output voltage of the second ac/dc conversion circuit 212a may also determine whether the transmission voltage increases or decreases, and at this time, feedback information for increasing the transmission voltage or decreasing the transmission voltage may be generated, and then the feedback information may be sent to the wireless transmitting apparatus to adjust the transmission voltage, so that the wireless transmitting apparatus may adjust the transmission power.
In some embodiments, the method may further comprise:
detecting a battery temperature of the battery;
when the detected battery temperature is greater than a temperature threshold value and less than a preset temperature value, sending a first instruction to the wireless transmitting device; wherein the first instruction is used for instructing the wireless transmitting device to adjust the transmission power of the electromagnetic signal.
It should be noted that, the temperature sensor may detect a battery temperature of the battery, may also detect a temperature of the receiving coil, and may even detect a housing temperature of the device to be charged, which is not specifically limited in the embodiment of the present application. Taking the battery temperature of the battery as an example, the detected battery temperature is compared with a temperature threshold, when the detected battery temperature is greater than the temperature threshold, it indicates that the battery temperature is too high, at this time, the charging power of the device to be charged can be reduced, that is, a first instruction is sent to the wireless transmitting device, and the first instruction is used for instructing the wireless transmitting device to adjust the transmitting power of the electromagnetic signal so as to reduce the battery temperature of the battery in the device to be charged.
In some embodiments, the method may further comprise:
detecting the charging state of the equipment to be charged;
when the charging state accords with an abnormal charging state, sending a second instruction to the wireless transmitting device; the second instruction is used for instructing the wireless transmitting device to stop transmitting the electromagnetic signal so as to stop the wireless transmitting device from providing the transmitting power for the equipment to be charged; wherein the abnormal state of charge comprises: the method comprises the following steps that the electric quantity information of the battery is larger than a preset electric quantity value, and/or the battery temperature of the battery is larger than a preset temperature value, and/or the charging voltage at two ends of the battery is larger than a preset voltage value, and/or the charging current of the battery is larger than a preset current value.
Taking the abnormal charging state that the electric quantity information of the battery is greater than the preset electric quantity value as an example, in the process of charging the device to be charged, the first control unit 214 may further detect the electric quantity of the battery 213, and then determine whether to continue to control the wireless transmitting device to provide the transmitting power to the device to be charged for charging according to the detected electric quantity of the battery. That is to say, the detected battery power is compared with the preset power threshold, and if the detected battery power is greater than the preset power threshold, it indicates that the battery is fully charged, at this time, the charging state may be an abnormal charging state, and a second instruction needs to be sent to the wireless transmitting apparatus, where the second instruction is used to instruct the wireless transmitting apparatus to stop transmitting the electromagnetic signal (i.e., to turn off the signal transmission of the transmitting coil), so as to stop the wireless transmitting apparatus from providing the transmitting power to the device to be charged, thereby stopping charging the battery of the device to be charged. In addition, if the detected electric quantity of the battery is less than the preset electric quantity threshold value, it indicates that the electric quantity of the battery is not fully charged, and at this time, the charging state may be a normal charging state, and a third instruction may be sent to the wireless transmitting apparatus, where the third instruction is used to instruct the wireless transmitting apparatus to continue to provide transmission power to the device to be charged, so as to continue to charge the battery of the device to be charged.
In some embodiments, the method may further comprise:
acquiring the maximum transmitting power of a wireless transmitting device;
and when the acquired maximum transmitting power is smaller than a preset power threshold, controlling the first charging unit or the second charging unit to work through a first control unit.
It should be noted that, after the maximum transmission power of the wireless transmitting apparatus is obtained, when the obtained maximum transmission power is smaller than the preset power threshold, the first control unit controls the first charging unit to operate, and the second charging unit does not operate; wherein, the first voltage conversion circuit is at least one of the following: buck circuit, charging IC or Charge pump circuit and charging IC's integrated circuit. Or when the acquired maximum transmitting power is smaller than a preset power threshold, the first control unit controls the second charging unit to work, and the first charging unit does not work; wherein, the second voltage conversion circuit is at least one of the following: buck circuit, charging IC or Charge pump circuit and charging IC's integrated circuit.
It should be noted that, since the receiving coil adopts a tapped manner, a plurality of charging units can be obtained, but only one of the plurality of charging units may operate. For example, if the maximum transmission power that can be provided by the wireless transmitting apparatus is less than a preset power threshold (e.g., 15W), only the first charging unit or the second charging unit may be controlled to operate at this time. It should be noted that, for the operating charging unit, the voltage conversion circuit included in the charging unit may be a Buck circuit, a charging IC, or an integrated circuit of a Charge pump circuit and the charging IC, and the embodiment of the present application is not limited in particular.
Further, the battery may include a single cell or a plurality of cells. When the battery comprises a plurality of battery cells, the plurality of battery cells can also comprise a multi-battery-cell series structure and a multi-battery-cell parallel structure. Thus, in some embodiments, when the battery is a multi-cell parallel structure, the method may further comprise:
controlling a kth charging unit in the plurality of charging units to charge corresponding to the kth battery cell; the kth cell of the battery is connected with the kth charging unit of the plurality of charging units, and k is a positive integer greater than or equal to 1 and less than or equal to N + 1.
When the receiving coil has one center tap, the plurality of charging units include a first charging unit and a second charging unit; the battery is assumed to be a double-cell parallel structure; at this time, the first battery cell can be charged by the first charging unit, and the second battery cell can be charged by the second charging unit; when the receiving coil has a plurality of taps, taking the apparatus to be charged 20 shown in fig. 4 as an example, in fig. 4, the battery 213 includes a battery cell 1, a battery cell 2, …, a battery cell N +1, and the like, and the battery cell 1, the battery cell 2, …, and the battery cell N +1 are in a parallel relationship; a first voltage conversion circuit in the first charging path is connected to the battery cell 1, a second voltage conversion circuit in the second charging path is connected to the battery cells 2 and …, and an N +1 voltage conversion circuit in the N +1 charging path is connected to the battery cell N + 1; so, can make first charging path charge for electric core 1, the second charging path charges for electric core 2, and the (N + 1) th charging path charges for electric core N +1 to can improve the charging speed.
In addition, in order to ensure the charging speed and further alleviate the heat generation phenomenon of the device to be charged 20, the battery 213 inside the device to be charged 20 may also be a multi-cell series structure, that is, multiple cells (for example, cell 1, cell 2, …, cell N +1, etc.) are in a series relationship. Compared with the single-cell scheme, if the same charging speed is achieved, the charging current required by the multi-cell series structure is 1/K (K is the number of the cells which are connected in series with each other in the device 20 to be charged) of the charging current required by a single cell; that is to say, on the premise of ensuring the same charging speed, the embodiment of the present application can greatly reduce the magnitude of the charging current, thereby further reducing the heat generation amount of the device to be charged 213 during the charging process.
The embodiment provides a wireless charging method which is applied to a device to be charged. The electromagnetic signal is received through a receiving coil, the receiving coil comprises a first end, a second end and a middle tap, a first charging unit is respectively connected with the first end and the middle tap, and a second charging unit is respectively connected with the second end and the middle tap; converting electromagnetic signals received by a first end and a middle tap of the receiving coil into a first voltage and a first current for charging a battery through a first charging unit; converting the electromagnetic signals received by the second end and the middle tap of the receiving coil into a second voltage and a second current for charging the battery through a second charging unit; providing a first voltage and a first current and a second voltage and a second current to the battery for charging; here, the receiving coil adopts a tapping mode, the received electromagnetic signals are divided into at least two paths of electromagnetic signals through at least one tap, and each path of electromagnetic signals in the at least two paths of electromagnetic signals is correspondingly input into each charging unit, so that at least two charging paths can be formed, and the charging power of the equipment to be charged is improved; in addition, because charging path has a plurality ofly, can also make the charging power on each charging path reduce to some extent, so can disperse the point that generates heat, reduced the charging and generate heat to charging efficiency has been promoted.
Based on the wireless charging system shown in fig. 7, refer to fig. 9, which shows a flowchart of a wireless charging method provided in an embodiment of the present application. As shown in fig. 9, the method may include:
s901: the electromagnetic signal is used for providing transmitting power for the equipment to be charged, so that a first charging unit and a second charging unit in the equipment to be charged charge a battery respectively, the first charging unit is connected with a first end and a middle tap of a receiving coil in the equipment to be charged respectively, and the second charging unit is connected with a second end and a middle tap of the receiving coil in the equipment to be charged respectively.
It should be noted that the wireless charging method is applied to the wireless transmitting apparatus described in any of the foregoing embodiments. In the wireless transmitting device, at least a transmitting coil is included, and the transmitting coil can generate electromagnetic induction with a receiving coil of the equipment to be charged.
In the embodiment of the application, the wireless transmitting device transmits an electromagnetic signal through the transmitting coil, and by using electromagnetic induction between the transmitting coil and the receiving coil, the wireless transmitting device can provide transmitting power to the device to be charged, so that a first charging unit and a second charging unit in the device to be charged can respectively charge the battery, the first charging unit is respectively connected with a first end and a middle tap of the receiving coil in the device to be charged, so as to form a first charging path, and the second charging unit is respectively connected with a second end and a middle tap of the receiving coil in the device to be charged, so as to form a second charging path. Therefore, due to the fact that the receiving coil of the equipment to be charged adopts a tapping mode, a plurality of charging paths can be formed, and each charging path can charge the battery, so that the charging power of the equipment to be charged is improved.
In some embodiments, the wireless transmitting apparatus may include a second communication unit, for S901, before transmitting the electromagnetic signal through the transmitting coil, the method further comprising:
establishing handshake communication with the equipment to be charged through the second communication unit;
and when the handshake communication is successfully established, controlling the wireless transmitting device to provide transmitting power for the equipment to be charged so as to charge the battery.
Before the device to be charged enters the charging process, it is first required that the device to be charged and the wireless transmitting apparatus can communicate with each other to establish a charging handshake protocol, so as to establish handshake communication between the device to be charged and the wireless transmitting apparatus. When the handshake communication is successfully established, the wireless transmitting device can be controlled to provide transmitting power for the equipment to be charged for charging. Here, the transmitting power provided by the wireless transmitting device to the device to be charged is converted into an electromagnetic signal by the transmitting coil and transmitted outwards, and then the electromagnetic signal is received by the receiving coil.
It should be further noted that the second communication unit may be a separate unit or module, may also be integrated in the second control unit of the wireless transmitting apparatus, and may even be integrated in the inverse rectification control unit, and the embodiment of the present application is not particularly limited.
Thus, based on the communication between the wireless transmitting device and the equipment to be charged, the equipment to be charged can send feedback information to the wireless transmitting device, and then the wireless transmitting device adjusts the transmitting power of the electromagnetic signal according to the received feedback information; wherein, the feedback information at least comprises one of the following: the charging voltage at two ends of the battery, the charging current of the battery, the output current of the first alternating current-direct current conversion circuit, the output voltage of the first alternating current-direct current conversion circuit, the output current of the second alternating current-direct current conversion circuit and the output voltage of the second alternating current-direct current conversion circuit; the charging voltage at the two ends of the battery and the charging current of the battery can be used for determining the transmitting power by the wireless transmitting device; the output current of the first alternating current-direct current conversion circuit, the output voltage of the first alternating current-direct current conversion circuit, the output current of the second alternating current-direct current conversion circuit and the output voltage of the second alternating current-direct current conversion circuit can be used for determining the transmission voltage when the wireless transmitting device determines the transmission power.
The embodiment provides a wireless charging method, which is applied to a wireless transmitting device. The device comprises a transmitting coil, a receiving coil, a first charging unit, a second charging unit, a first charging unit and a second charging unit, wherein the transmitting coil is used for transmitting an electromagnetic signal which is used for providing transmitting power for a device to be charged, so that the first charging unit and the second charging unit in the device to be charged are used for charging a battery respectively; therefore, the receiving coil of the equipment to be charged adopts a tapping mode, so that not only can the coil be enlarged, but also a charging path can be increased, and the charging power of the equipment to be charged is improved; in addition, because charging path has a plurality ofly, can also make the charging power on each charging path reduce to some extent, so can disperse the point that generates heat, reduced the charging and generate heat to charging efficiency has been promoted.
It is understood that in the embodiments of the present application, a "unit" may be a part of a circuit, a part of a processor, a part of a program or software, and the like, and may also be a module, and may also be non-modular. Moreover, each component in the embodiment may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware or a form of a software functional module.
Based on the understanding that the technical solutions of the embodiments of the present application essentially or partially contribute to the prior art, or all or part of the technical solutions may be embodied in the form of a software product stored in a storage medium, and include several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (processor) to execute all or part of the steps of the method according to the present embodiment. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
Accordingly, the present embodiments provide a computer storage medium storing a wireless charging program that, when executed by a device to be charged, implements the method of any of the preceding embodiments.
Specifically, in the embodiment of the present application, a program or an instruction corresponding to a wireless charging method may be stored on a storage medium such as an optical disc, a hard disk, or a usb flash disk, and when the program corresponding to the wireless charging method in the storage medium is read or executed by a device to be charged, the method includes the following steps:
a receive coil comprising a first end, a second end, and an intermediate tap;
the first charging unit is respectively connected with the first end and the middle tap and is used for converting the electromagnetic signals received by the first end and the middle tap of the receiving coil into a first voltage and a first current for charging a battery;
and the second charging unit is respectively connected with the second end and the middle tap and is used for converting the electromagnetic signals received by the second end and the middle tap of the receiving coil into a second voltage and a second current for charging the battery.
In addition, another computer storage medium is provided in an embodiment of the present application, where the computer storage medium stores a wireless charging program, and the wireless charging program, when executed by a wireless transmitting apparatus, implements the method in any one of the foregoing embodiments.
Specifically, in the embodiment of the present application, a program or an instruction corresponding to a wireless charging method may be stored on a storage medium such as an optical disc, a hard disk, or a usb flash disk, and when the program corresponding to the wireless charging method in the storage medium is read or executed by a wireless transmitting device, the method includes the following steps:
the electromagnetic signal is used for providing transmitting power for the equipment to be charged, so that a first charging unit and a second charging unit in the equipment to be charged charge a battery respectively, the first charging unit is connected with a first end and a middle tap of a receiving coil in the equipment to be charged respectively, and the second charging unit is connected with a second end and a middle tap of the receiving coil in the equipment to be charged respectively.
It should be noted that, in the embodiments of the present application, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The above-mentioned serial numbers of the embodiments of the present application are merely for description and do not represent the merits of the embodiments.
The methods disclosed in the several method embodiments provided in the present application may be combined arbitrarily without conflict to obtain new method embodiments.
Features disclosed in several of the product embodiments provided in the present application may be combined in any combination to yield new product embodiments without conflict.
The features disclosed in the several method or apparatus embodiments provided in the present application may be combined arbitrarily, without conflict, to arrive at new method embodiments or apparatus embodiments.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (40)

1. An apparatus to be charged, characterized in that the apparatus to be charged comprises:
a receive coil comprising a first end, a second end, and an intermediate tap;
the first charging unit is respectively connected with the first end and the middle tap and is used for converting the electromagnetic signals received by the first end and the middle tap of the receiving coil into a first voltage and a first current for charging a battery;
and the second charging unit is respectively connected with the second end and the middle tap and is used for converting the electromagnetic signals received by the second end and the middle tap of the receiving coil into a second voltage and a second current for charging the battery.
2. The apparatus to be charged according to claim 1, characterized in that the apparatus to be charged further comprises:
the first control unit is used for controlling the first charging unit and/or the second charging unit to work according to a charging mode or a charging stage of the battery so as to charge the battery;
wherein the charging modes include a first charging mode and a second charging mode, a charging speed of the first charging mode is greater than a charging speed of the second charging mode, and a charging phase of the battery includes at least one of: a trickle charge phase, a constant current charge phase and a constant voltage charge phase.
3. A device to be charged according to claim 2,
the first charging unit includes: a first AC/DC conversion circuit and a first voltage conversion circuit;
the second charging unit includes: a second AC/DC conversion circuit and a second voltage conversion circuit;
the first control unit is configured to control the first ac/dc conversion circuit and the first voltage conversion circuit to operate and/or control the second ac/dc conversion circuit and the second voltage conversion circuit to operate according to the charging mode or the charging stage of the battery.
4. The device to be charged according to claim 3, wherein the first voltage conversion circuit is a Buck Buck circuit, a charging Integrated Circuit (IC), or a Buck-Boost Buck-Boost circuit.
5. A device to be charged according to claim 3 or 4,
the first control unit is used for controlling the first voltage conversion circuit to work in one or more of the following charging phases: the trickle charge phase, the constant current charge phase, and the constant voltage charge phase.
6. The device to be charged according to claim 3, wherein the second voltage conversion circuit is a Charge pump circuit;
the first control unit is used for controlling the second voltage conversion circuit to work in the constant current charging stage.
7. The device to be charged according to claim 3, wherein the first voltage conversion circuit and the second voltage conversion circuit are both Charge pump circuits;
the device to be charged further includes: a third voltage conversion circuit connected to the first ac-dc conversion circuit and/or the second ac-dc conversion circuit;
the first control unit is used for controlling the first voltage conversion circuit and the second voltage conversion circuit to work in a constant current charging stage, and controlling the third voltage conversion circuit to work in a trickle charging stage and/or a constant voltage charging stage.
8. The apparatus to be charged according to claim 7, wherein the third voltage conversion circuit is a charging IC, a Buck circuit, or a Buck-Boost circuit.
9. A device to be charged according to claim 1,
the first charging unit includes: a first AC/DC conversion circuit;
the second charging unit includes: a second AC/DC conversion circuit;
the device to be charged further includes:
the fourth voltage conversion circuit is connected with the first alternating current-direct current conversion circuit and the second alternating current-direct current conversion circuit;
the fifth voltage conversion circuit is respectively connected with the first alternating current-direct current conversion circuit and/or the second alternating current-direct current conversion circuit;
and the first control unit is used for controlling the fourth voltage conversion circuit to work in a constant current charging stage and controlling the fifth voltage conversion circuit to work in a trickle charging stage and/or a constant voltage charging stage.
10. A device to be charged according to claim 9,
the fourth voltage conversion circuit is a Charge pump circuit, and the fifth voltage conversion circuit is a charging IC, a Buck circuit or a Buck-Boost circuit.
11. A device to be charged according to any of claims 3 to 10,
the first control unit is further configured to generate feedback information according to at least one of the following charging parameters, and feed the feedback information back to the wireless transmitting apparatus: the charging voltage at two ends of the battery, the charging current of the battery, the output current of the first alternating current-direct current conversion circuit, the output voltage of the first alternating current-direct current conversion circuit, the output current of the second alternating current-direct current conversion circuit and the output voltage of the second alternating current-direct current conversion circuit;
the charging voltage at two ends of the battery and the charging current of the battery are used for determining the transmitting power by the wireless transmitting device;
the output current of the first alternating current-direct current conversion circuit, the output voltage of the first alternating current-direct current conversion circuit, the output current of the second alternating current-direct current conversion circuit and the output voltage of the second alternating current-direct current conversion circuit are used for determining the transmission voltage when the wireless transmitting device determines the transmission power.
12. A device to be charged according to any of claims 3 to 10,
the first control unit is used for determining required charging power according to the charging voltage at two ends of the battery and/or the charging current of the battery; and the number of the first and second groups,
and feeding back the required charging power to a wireless transmitting device, so that the wireless transmitting device adjusts the transmitting power of the electromagnetic signal according to the required charging power.
13. A device to be charged according to any of claims 3 to 10,
the first control unit is used for determining a required current according to the output current and/or the output voltage of the first alternating current-direct current conversion circuit and/or according to the output current and/or the output voltage of the second alternating current-direct current conversion circuit; and the number of the first and second groups,
and feeding back the required current to the wireless transmitting device so that the wireless transmitting device adjusts the transmitting power of the electromagnetic signal according to the required current.
14. A device to be charged according to any of claims 3 to 10,
the first control unit is used for determining required charging power according to the charging voltage at two ends of the battery and/or the charging current of the battery; determining a required current according to the output current and/or the output voltage of the first alternating current-direct current conversion circuit and/or according to the output current and/or the output voltage of the second alternating current-direct current conversion circuit; and the number of the first and second groups,
determining a required voltage according to the required charging power and the required current;
and feeding back the required voltage to the wireless transmitting device so that the wireless transmitting device adjusts the transmitting power of the electromagnetic signal according to the required voltage.
15. A device to be charged according to claim 14,
the first control unit is further configured to compare the required voltage with the currently received output voltage of the first ac-dc conversion circuit and/or the currently received output voltage of the second ac-dc conversion circuit after determining the required voltage, and determine a voltage difference; and the number of the first and second groups,
and feeding back the voltage difference value to a wireless transmitting device so that the wireless transmitting device adjusts the transmitting power of the electromagnetic signal according to the voltage difference value.
16. A device to be charged according to any of claims 3 to 10,
the first control unit is further configured to send feedback information of increasing or decreasing the transmission voltage to the wireless transmission apparatus.
17. A device to be charged according to any of claims 2 to 16,
the first control unit is also used for detecting the battery temperature of the battery; and the number of the first and second groups,
when the detected battery temperature is greater than a temperature threshold value and less than a preset temperature value, sending a first instruction to the wireless transmitting device; wherein the first instruction is used for instructing the wireless transmitting device to adjust the transmission power of the electromagnetic signal.
18. A device to be charged according to any of claims 2 to 17,
the first control unit is also used for detecting the charging state of the equipment to be charged; and the number of the first and second groups,
when the charging state accords with an abnormal charging state, sending a second instruction to the wireless transmitting device; the second instruction is used for instructing the wireless transmitting device to stop transmitting the electromagnetic signal so as to stop the wireless transmitting device from providing the transmitting power for the equipment to be charged; wherein the abnormal state of charge comprises: the method comprises the following steps that the electric quantity information of the battery is larger than a preset electric quantity value, and/or the battery temperature of the battery is larger than a preset temperature value, and/or the charging voltage at two ends of the battery is larger than a preset voltage value, and/or the charging current of the battery is larger than a preset current value.
19. A device to be charged according to any of claims 2 to 18,
the first control unit is further used for acquiring the maximum transmitting power of the wireless transmitting device; and the number of the first and second groups,
and when the acquired maximum transmitting power is smaller than a preset power threshold, controlling the first charging unit to work or the second charging unit to work.
20. An apparatus to be charged, characterized in that the apparatus to be charged comprises:
the receiving coil comprises a first end, a second end and N taps, wherein N is a positive integer greater than 1;
the first charging unit is respectively connected with the first end and a first tap of the N taps and is used for converting the electromagnetic signals received by the first end and the first tap of the receiving coil into a first voltage and a first current for charging a battery;
the ith charging unit is respectively connected with the i-1 th tap and the ith tap of the N taps and is used for converting the electromagnetic signals received by the i-1 th tap and the ith tap of the receiving coil into the ith voltage and the ith current for charging the battery, wherein i is a positive integer which is greater than 1 and less than or equal to N;
and the (N + 1) th charging unit is respectively connected with the (N) th tap of the (N) taps and the second end and is used for converting the electromagnetic signals received by the (N) th tap of the receiving coil and the second end into the (N + 1) th voltage and the (N + 1) th current for charging the battery.
21. The device to be charged according to claim 20, wherein the kth charging unit comprises a kth ac-dc conversion circuit and a kth voltage conversion circuit, the kth ac-dc conversion circuit is connected with the kth voltage conversion circuit, k is a positive integer greater than or equal to 1 and less than or equal to N + 1; wherein the content of the first and second substances,
the kth alternating current-direct current conversion circuit is used for performing alternating current-direct current voltage conversion on the kth electromagnetic signal correspondingly received from the receiving coil to obtain output voltage and output current of the kth alternating current-direct current conversion circuit;
and the kth voltage conversion circuit is used for performing direct current-direct current voltage conversion on the output voltage and the output current of the kth alternating current-direct current conversion circuit to obtain the kth voltage and the kth current for charging the battery.
22. The apparatus to be charged of claim 21, wherein the battery comprises a multi-cell series configuration and a multi-cell parallel configuration; wherein the content of the first and second substances,
when the battery is in a multi-cell parallel structure, a kth cell in the multi-cell is connected with a kth voltage conversion circuit in the kth charging unit to control each charging unit to charge corresponding to each cell, wherein k is a positive integer greater than or equal to 1 and less than or equal to N + 1.
23. A wireless charging system is characterized by comprising a wireless transmitting device and a device to be charged; the wireless transmitting device comprises a transmitting coil, and the equipment to be charged comprises a receiving coil, a first charging unit and a second charging unit; wherein the content of the first and second substances,
the transmitting coil is used for transmitting electromagnetic signals;
the receiving coil comprises a first end, a second end and a middle tap and is used for receiving the electromagnetic signal transmitted by the transmitting coil;
the first charging unit is respectively connected with the first end and the middle tap and is used for converting electromagnetic signals received by the first end and the middle tap of the receiving coil into a first voltage and a first current for charging a battery;
the second charging unit is respectively connected with the second end and the middle tap and is used for converting the electromagnetic signals received by the second end and the middle tap of the receiving coil into a second voltage and a second current for charging the battery.
24. The wireless charging system according to claim 23, wherein the first charging unit includes a first ac/dc conversion circuit and a first voltage conversion circuit, the second charging unit includes a second ac/dc conversion circuit and a second voltage conversion circuit, and the device to be charged further includes:
the first control unit is used for controlling the first alternating current-direct current conversion circuit and the first voltage conversion circuit to work and/or controlling the second alternating current-direct current conversion circuit and the second voltage conversion circuit to work according to a charging mode or a charging stage of the battery; wherein the charging modes include a first charging mode and a second charging mode, a charging speed of the first charging mode is greater than a charging speed of the second charging mode, and a charging phase of the battery includes at least one of: a trickle charge phase, a constant current charge phase and a constant voltage charge phase.
25. A wireless charging method is applied to a device to be charged, and comprises the following steps:
receiving an electromagnetic signal by a receiving coil; the receiving coil comprises a first end, a second end and a middle tap, the first charging unit is respectively connected with the first end and the middle tap, and the second charging unit is respectively connected with the second end and the middle tap;
converting, by the first charging unit, electromagnetic signals received by the first end and the center tap of the receiving coil into a first voltage and a first current for charging a battery;
converting, by the second charging unit, electromagnetic signals received by the second end and the center tap of the receiving coil into a second voltage and a second current for charging a battery;
providing the first voltage and the first current and the second voltage and the second current to the battery for charging.
26. The method of claim 25, further comprising:
controlling the first charging unit and/or the second charging unit to work through a first control unit according to a charging mode or a charging stage of the battery so as to charge the battery;
wherein the charging modes include a first charging mode and a second charging mode, a charging speed of the first charging mode is greater than a charging speed of the second charging mode, and a charging phase of the battery includes at least one of: a trickle charge phase, a constant current charge phase and a constant voltage charge phase.
27. The method of claim 26, wherein the first charging unit comprises a first ac/dc conversion circuit and a first voltage conversion circuit, and the second charging unit comprises a second ac/dc conversion circuit and a second voltage conversion circuit, and the controlling the first charging unit and/or the second charging unit to operate according to a charging mode or a charging phase of the battery by the first control unit comprises:
and controlling the first alternating current-direct current conversion circuit and the first voltage conversion circuit to work and/or controlling the second alternating current-direct current conversion circuit and the second voltage conversion circuit to work through the first control unit according to the charging mode or the charging stage of the battery.
28. The method of claim 27, wherein the first voltage conversion circuit is a Buck circuit, a charging IC, or a Buck-Boost circuit, the method further comprising:
controlling, by the first control unit, the first voltage conversion circuit to operate in one or more of the following charging phases: the trickle charge phase, the constant current charge phase, and the constant voltage charge phase.
29. The method of claim 27, wherein the second voltage conversion circuit is a Charge pump circuit, the method further comprising:
and controlling the second voltage conversion circuit to work in the constant current charging stage through the first control unit.
30. The method of claim 27, wherein the first voltage conversion circuit and the second voltage conversion circuit are both Charge pump circuits, wherein the device to be charged further comprises a third voltage conversion circuit, and wherein the method further comprises:
when the battery is in a constant current charging stage, the first control unit controls the first voltage conversion circuit and the second voltage conversion circuit to work;
when the battery is in a trickle charge stage and/or a constant voltage charge stage, controlling the third voltage conversion circuit to work through the first control unit; the third voltage conversion circuit is a charging IC, a Buck circuit or a Buck-Boost circuit.
31. The method of claim 25, wherein the device to be charged further comprises a fourth voltage conversion circuit and a fifth voltage conversion circuit, the method further comprising:
when the battery is in a constant current charging stage, the first control unit controls the fourth voltage conversion circuit to work;
when the battery is in a trickle charge stage and/or a constant voltage charge stage, controlling the fifth voltage conversion circuit to work through the first control unit; the fourth voltage conversion circuit is a Charge pump circuit, and the fifth voltage conversion circuit is a charging IC, a Buck circuit or a Buck-Boost circuit.
32. The method of any one of claims 27 to 31, further comprising:
generating, by the first control unit, feedback information according to at least one of the following charging parameters, and feeding back the feedback information to the wireless transmitting device; wherein the charging parameters include: the charging voltage at two ends of the battery, the charging current of the battery, the output current of the first alternating current-direct current conversion circuit, the output voltage of the first alternating current-direct current conversion circuit, the output current of the second alternating current-direct current conversion circuit and the output voltage of the second alternating current-direct current conversion circuit.
33. The method of claim 32, wherein feeding back the feedback information to a wireless transmitting device comprises:
determining required charging power according to the charging voltage at two ends of the battery and/or the charging current of the battery;
feeding back the required charging power serving as the feedback information to the wireless transmitting device, so that the wireless transmitting device adjusts the transmitting power of the electromagnetic signal according to the required charging power.
34. The method of claim 32, wherein feeding back the feedback information to a wireless transmitting device comprises:
determining a required current according to the output current and/or the output voltage of the first alternating current-direct current conversion circuit and/or according to the output current and/or the output voltage of the second alternating current-direct current conversion circuit;
and feeding back the required current as the feedback information to the wireless transmitting device, so that the wireless transmitting device adjusts the transmitting power of the electromagnetic signal according to the required current.
35. The method of claim 32, wherein feeding back the feedback information to a wireless transmitting device comprises:
determining required charging power according to the charging voltage at two ends of the battery and/or the charging current of the battery;
determining a required current according to the output current and/or the output voltage of the first alternating current-direct current conversion circuit and/or according to the output current and/or the output voltage of the second alternating current-direct current conversion circuit;
determining a required voltage according to the required charging power and the required current;
and feeding back the required voltage serving as the feedback information to the wireless transmitting device, so that the wireless transmitting device adjusts the transmitting power of the electromagnetic signal according to the required voltage.
36. The method of claim 35, wherein after said determining the demand voltage, the method further comprises:
according to the determined required voltage, comparing the required voltage with the currently received output voltage of the first alternating current-direct current conversion circuit and/or the output voltage of the second alternating current-direct current conversion circuit, and determining a voltage difference value;
and feeding back the voltage difference value as the feedback information to the wireless transmitting device so that the wireless transmitting device adjusts the transmitting power of the electromagnetic signal according to the voltage difference value.
37. The method of any one of claims 25 to 36, further comprising:
detecting a battery temperature of the battery;
when the detected battery temperature is greater than a temperature threshold value and less than a preset temperature value, sending a first instruction to a wireless transmitting device; wherein the first instruction is used for instructing the wireless transmitting device to adjust the transmission power of the electromagnetic signal.
38. The method of any one of claims 25 to 37, further comprising:
detecting the charging state of the equipment to be charged;
when the charging state accords with an abnormal charging state, sending a second instruction to the wireless transmitting device; the second instruction is used for instructing the wireless transmitting device to stop transmitting the electromagnetic signal so as to stop the wireless transmitting device from providing the transmitting power for the equipment to be charged; wherein the abnormal state of charge comprises: the method comprises the following steps that the electric quantity information of the battery is larger than a preset electric quantity value, and/or the battery temperature of the battery is larger than a preset temperature value, and/or the charging voltage at two ends of the battery is larger than a preset voltage value, and/or the charging current of the battery is larger than a preset current value.
39. The method of any one of claims 25 to 38, further comprising:
acquiring the maximum transmitting power of a wireless transmitting device;
and when the acquired maximum transmitting power is smaller than a preset power threshold, controlling the first charging unit or the second charging unit to work through a first control unit.
40. A computer storage medium storing a wireless charging program that, when executed by a device to be charged, implements the method of any of claims 25 to 39.
CN201911115066.4A 2019-11-14 2019-11-14 Device to be charged, system, wireless charging method and storage medium Pending CN112803610A (en)

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PCT/CN2020/127486 WO2021093704A1 (en) 2019-11-14 2020-11-09 Apparatus and system to be charged, wireless charging method, and storage medium
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